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 Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) From: Barton Willis - 2015-04-19 23:43:27 Attachments: Message as HTML ```Maybe you would like something like: (%i9) :lisp(defun tan-integral (x) (setq x (take '(%cos) x)) (mul -1 (take '(%log) (if '\$logabs (take '(mabs) x) x)))) (%i9) :lisp(putprop '%tan `((x) ,#'tan-integral) 'integral)); (%i11) integrate([tan(x), sin(x)/cos(x)],x),logabs : false; (%o11) [-log(abs(cos(x))),-log(cos(x))] (%i12) integrate([tan(x) ,sin(x)/cos(x)],x),logabs : false; (%o12) [-log(abs(cos(x))),-log(cos(x))] I don't think much (any?) effort has been made to make semantically equal integrands to have syntactically equal outputs. Maxima's integration code tries this method followed by that--that makes it difficult, I think, to achieve such a goal. --Barton ________________________________ From: David Scherfgen Sent: Saturday, April 18, 2015 05:21 To: maxima-discuss@... Subject: Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) I wasn't suggesting that logabs should be turned on by default. My point was that if the option is provided, then it should behave consistently and give the same answer for sin(x)/cos(x) and tan(x), etc. Further, the Maxima manual entry for logabs says: For definite integration, the logabs:true setting is used, because here "evaluation" of the indefinite integral at the endpoints is often needed. Shouldn't it be possible then to find an example where, for some limits a, b, something like integrate(sin(x)/cos(x),x,a,b) would give a different answer than integrate(tan(x),x,a,b)? Best regards, David 2015-04-18 8:29 GMT+02:00 Gunter Königsmann >: Correctness is important. But sometimes I wonder if there is a way to make maxima tell the user that it refuses to do something that *looks* obvious since it is fundamentally incorrect. Let the computer help with at least part of the teaching? I assume there is no possibility to do so, though. And if there were any it would probably mean loads of bogus warnings. Kind regards, Gunter. Am 17. April 2015 23:49:59 MESZ, schrieb Raymond Toy >: "Barton" == Barton Willis > writes: Barton> Telling calculus students that integrate(1/x,x) = Barton> log(abs(x)) is somewhat slothful. If we didn't conflate Barton> functions and their formula, maybe it would be a better Barton> world: Barton> integrate(x in (-inf,0) --> 1/x) = x in (-inf 0) --> log(-x), (1) Barton> integrate(x in (0,inf) --> 1/x) = x in (0, inf) --> log(x), (2) Barton> integrate(x in [-1,1]) --> 1/x) = bogus (3) Barton> Surely a student should look at the limits of integration Barton> and choose between (1), (2), or (3). The logabs issue Barton> comes up every so often. Users want answers that match US Barton> calculus textbooks--I can understand that point of Barton> view. But it does eliminate a teachable moment. I'm sure many people disagree with me, but I've always felt maxima should default to correctness, even if that means those high school and college students don't get the answer they expect. (Because they've been taught the wrong thing or because they don't remember.) I guess a corollary is not catering to beginners too much; you're only a beginner once, so let's educate them so they're not beginners anymore. -- Ray ________________________________ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF ________________________________ Maxima-discuss mailing list Maxima-discuss@... https://lists.sourceforge.net/lists/listinfo/maxima-discuss -- Diese Nachricht wurde von meinem Mobiltelefon mit Kaiten Mail gesendet. ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Maxima-discuss mailing list Maxima-discuss@... https://lists.sourceforge.net/lists/listinfo/maxima-discuss ```
 [Maxima-discuss] maxima for centos 7 From: Antonio Lapira - 2015-04-19 20:07:06 Attachments: Message as HTML ```isn't there an rpm for x86_64 linux?I'm using centos 7 and I'd like to install maxima.. how to do? do I need to compile it? ```
 Re: [Maxima-discuss] Maxima Export Control From: Richard Fateman - 2015-04-19 14:41:03 ```See some discussion here https://www.ma.utexas.edu/pipermail/maxima/2011/024715.html So far as I know, encryption was not an issue then. RJF On 4/19/2015 7:35 AM, Volker van Nek wrote: > In share/contrib/gf there are two files about AES containing examples on > encryption. I don't know if these files can be regarded by someone as a > potential threat to the US-security. In doubt it may be better to cut > them out. > > Volker van Nek > > Am 19.04.2015 um 07:23 schrieb Gunter Königsmann: >> Afaik normally the export controls are about encryption. I would be surprised if maxima would use encryption for anything. >> Kind regards, Gunter. >> >> Am 19. April 2015 05:40:59 MESZ, schrieb Parag Magunia : >>> Is export of Maxima source code restricted to “rogue” states under US >>> law ? >>> >>> I have an Amazon AWS image which contains compiled Maxima and R >>> binaries that I’d like to make public as an AWS AMI. >>> >>> In SourceForge, there is a convenient checkbox for export control >>> projects, but wasn’t sure if it was necessary at all to checkmark. >>> >>> I thank the group for any informal guidance that they can provide. >>> >>> >>> Parag >>> >>> ------------------------------------------------------------------------------ >>> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >>> Develop your own process in accordance with the BPMN 2 standard >>> Learn Process modeling best practices with Bonita BPM through live >>> exercises >>> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- >>> event?utm_ >>> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >>> _______________________________________________ >>> Maxima-discuss mailing list >>> Maxima-discuss@... >>> https://lists.sourceforge.net/lists/listinfo/maxima-discuss >> >> >> ------------------------------------------------------------------------------ >> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >> Develop your own process in accordance with the BPMN 2 standard >> Learn Process modeling best practices with Bonita BPM through live exercises >> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ >> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >> >> >> >> _______________________________________________ >> Maxima-discuss mailing list >> Maxima-discuss@... >> https://lists.sourceforge.net/lists/listinfo/maxima-discuss >> > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > _______________________________________________ > Maxima-discuss mailing list > Maxima-discuss@... > https://lists.sourceforge.net/lists/listinfo/maxima-discuss ```
 Re: [Maxima-discuss] Maxima Export Control From: Volker van Nek - 2015-04-19 14:35:56 ```In share/contrib/gf there are two files about AES containing examples on encryption. I don't know if these files can be regarded by someone as a potential threat to the US-security. In doubt it may be better to cut them out. Volker van Nek Am 19.04.2015 um 07:23 schrieb Gunter Königsmann: > Afaik normally the export controls are about encryption. I would be surprised if maxima would use encryption for anything. > Kind regards, Gunter. > > Am 19. April 2015 05:40:59 MESZ, schrieb Parag Magunia : >> Is export of Maxima source code restricted to “rogue” states under US >> law ? >> >> I have an Amazon AWS image which contains compiled Maxima and R >> binaries that I’d like to make public as an AWS AMI. >> >> In SourceForge, there is a convenient checkbox for export control >> projects, but wasn’t sure if it was necessary at all to checkmark. >> >> I thank the group for any informal guidance that they can provide. >> >> >> Parag >> >> ------------------------------------------------------------------------------ >> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >> Develop your own process in accordance with the BPMN 2 standard >> Learn Process modeling best practices with Bonita BPM through live >> exercises >> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- >> event?utm_ >> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >> _______________________________________________ >> Maxima-discuss mailing list >> Maxima-discuss@... >> https://lists.sourceforge.net/lists/listinfo/maxima-discuss > > > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > > > > _______________________________________________ > Maxima-discuss mailing list > Maxima-discuss@... > https://lists.sourceforge.net/lists/listinfo/maxima-discuss > ```
 [Maxima-discuss] Errors in GCL Maxima From: Ira Deutsch - 2015-04-19 12:11:46 ```Dear Sir/Madam, While runnng the testsuite, these errors cropped up in GCL Maxima. For Maxima 5.34.1. Error summary: Errors found in /home/jdeutsch/Compile/maxima-5.34.1/tests/rtest1.mac, problems: (38 47) Errors found in /home/jdeutsch/Compile/maxima-5.34.1/tests/rtest16.mac, problems: (88 89) Errors found in /home/jdeutsch/Compile/maxima-5.34.1/tests/rtest_numth.mac, problems: (161 167 168 169 170 171) 10 tests failed out of 9,966 total tests. real time : 815.230 secs run-gbc time : 704.970 secs child run time : 2.220 secs gbc time : 104.830 secs (%o0) done (%i1) closefile(); For Maxima 5.35.1, Error summary: Errors found in /home/jdeutsch/Compile/maxima-5.35.1/tests/rtest1.mac, problems: (38 47) Errors found in /home/jdeutsch/Compile/maxima-5.35.1/tests/rtest16.mac, problems: (74 75) Error found in /home/jdeutsch/Compile/maxima-5.35.1/tests/rexamples.mac, problem: (95) Errors found in /home/jdeutsch/Compile/maxima-5.35.1/tests/rtest_numth.mac, problems: (161 167 168 169 170 171) Errors found in /home/jdeutsch/Compile/maxima-5.35.1/tests/rtest_powerseries.mac, problems: (16 17 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 44 45 46 47 48 49 50 51 53 54 55 59 60) 50 tests failed out of 10,028 total tests. real time : 1801.790 secs run-gbc time : 1602.900 secs child run time : 4.790 secs gbc time : 188.170 secs (%o0) done There are no problems with Maxima 5.31.2. I am compiling on 32 bit Slackware 12.2. GCL Maxima is much faster than the CLISP version. Any advice would be appreciated. Sincerely yours, J. Ira Deutsch ```
 Re: [Maxima-discuss] parse_timedate error, was: Maxima 5.36.0 rpms & tar.gz posted From: Wolfgang Dautermann - 2015-04-19 12:07:53 Attachments: maxima.txt ```On 18.04.2015 22:29, Robert Dodier wrote: > Perhaps you or someone else can execute Maxima with the debugger > enabled (maxima -g) and get a stack trace (just enter backtrace at > the debugger prompt) ?? I have done that. I hope it helps you fixing the bug. Best regards, Wolfgang ```
 Re: [Maxima-discuss] ccl build on windows From: Gunter Königsmann - 2015-04-19 10:42:40 Attachments: Message as HTML ```You are right: I assume it contained an E, not an 10^. Kind regards, Gunter. On Sa, Apr 18, 2015 at 10:14 , Robert Dodier wrote: > On 2015-04-17, Gunter Königsmann wrote: > >> I assume I found an error in the CCL version that is used in the >> current windows installer: >> >> %i1 load("engineering-format")\$ >> %i2 0.5; >> %o2 5.0*10^-7 > > Hmm, is that the verbatim output? If so, that's very strange. But was > the actual output 5.0e-7 perhaps? If so, that's less strange. There is > at least one known bug in the output of FORMAT for floats on CCL. > > best, > > Robert Dodier > > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live > exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- > event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > _______________________________________________ > Maxima-discuss mailing list > Maxima-discuss@... > https://lists.sourceforge.net/lists/listinfo/maxima-discuss ```
 Re: [Maxima-discuss] Maxima Export Control From: Gunter Königsmann - 2015-04-19 05:23:46 Attachments: Message as HTML ```Afaik normally the export controls are about encryption. I would be surprised if maxima would use encryption for anything. Kind regards, Gunter. Am 19. April 2015 05:40:59 MESZ, schrieb Parag Magunia : >Is export of Maxima source code restricted to “rogue” states under US >law ? > >I have an Amazon AWS image which contains compiled Maxima and R >binaries that I’d like to make public as an AWS AMI. > >In SourceForge, there is a convenient checkbox for export control >projects, but wasn’t sure if it was necessary at all to checkmark. > >I thank the group for any informal guidance that they can provide. > > >Parag > >------------------------------------------------------------------------------ >BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >Develop your own process in accordance with the BPMN 2 standard >Learn Process modeling best practices with Bonita BPM through live >exercises >http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- >event?utm_ >source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >_______________________________________________ >Maxima-discuss mailing list >Maxima-discuss@... >https://lists.sourceforge.net/lists/listinfo/maxima-discuss -- Diese Nachricht wurde von meinem Mobiltelefon mit Kaiten Mail gesendet.```
 [Maxima-discuss] Maxima Export Control From: Parag Magunia - 2015-04-19 03:57:08 ```Is export of Maxima source code restricted to “rogue” states under US law ? I have an Amazon AWS image which contains compiled Maxima and R binaries that I’d like to make public as an AWS AMI. In SourceForge, there is a convenient checkbox for export control projects, but wasn’t sure if it was necessary at all to checkmark. I thank the group for any informal guidance that they can provide. Parag ```
 [Maxima-discuss] parse_timedate error, was: Maxima 5.36.0 rpms & tar.gz posted From: Robert Dodier - 2015-04-18 20:30:12 ```On 2015-04-18, Wolfgang Dautermann wrote: > Maxima 5.36.0 http://maxima.sourceforge.net > using Lisp CLISP 2.49 (2010-07-07) > Distributed under the GNU Public License. See the file COPYING. > Dedicated to the memory of William Schelter. > The function bug_report() provides bug reporting information. > (%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) > 0 > (%i1) :lisp (decode-universal-time 0 0) > 0 > 0 > 0 > 1 > 1 > 1900 > 0 > NIL > 0 > (%i1) > > I assume, that is the expected result? Well, I actually expected one or the other of those to cause an error ... I'm kind of confused now. Maybe the error is not coming from one or the other of those functions. Perhaps you or someone else can execute Maxima with the debugger enabled (maxima -g) and get a stack trace (just enter backtrace at the debugger prompt) ?? > Sorry for the delay. I am rather busy now organizing a local Linux > event ("Grazer Linuxtage"), which will be on 24th and 25th of April. Terrific, keep up the good work! best, Robert Dodier ```
 [Maxima-discuss] Windows installer upload; was: Maxima 5.36.0 rpms & tar.gz posted From: Robert Dodier - 2015-04-18 20:24:47 ```On 2015-04-18, Gunter Königsmann wrote: > We should put this installer into the download section on sourceforge.net, too. I think that is a good idea. If you wish, you can upload the file. I have added your SF user name (peterpall) to the list of developers for the project -- I believe this will enable you to upload files to the file manager. If you navigate to the Maxima-Windows/5.36.0-Windows folder I believe you will see a button "Add File". Be sure to give the file a name which is a little descriptive, and different from any existing file. Thanks for your help, should you choose to do so. best Robert Dodier ```
 Re: [Maxima-discuss] ccl build on windows From: Robert Dodier - 2015-04-18 20:14:27 ```On 2015-04-17, Gunter Königsmann wrote: > I assume I found an error in the CCL version that is used in the > current windows installer: > > %i1 load("engineering-format")\$ > %i2 0.5; > %o2 5.0*10^-7 Hmm, is that the verbatim output? If so, that's very strange. But was the actual output 5.0e-7 perhaps? If so, that's less strange. There is at least one known bug in the output of FORMAT for floats on CCL. best, Robert Dodier ```
 Re: [Maxima-discuss] integrate(cot(x),x,0,inf) --> crash From: Robert Dodier - 2015-04-18 20:08:28 ```On 2015-04-18, David Scherfgen wrote: > (%i1) integrate(cot(x),x,0,inf); > INFO: Control stack guard page unprotected > Control stack guard page temporarily disabled: proceed with caution > > Maxima encountered a Lisp error: > > Control stack exhausted (no more space for function call frames). Thanks for this report. Looks like integrate calls limit which calls taylor, and then it gets into an infinite loop of TAYLOR2 --> TSPLUS --> TAYLOR2 --> TSTIMES --> TAYLOR2 ... Maybe someone can investigate. best, Robert Dodier ```
 Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted From: Dr. Wolfgang Lindner - 2015-04-18 12:28:47 ```Dear Jeremy, dear Marco, thanks for the info, it was irritating for me at first glance, now it's calming. ok by me. best Wolfgang -- Dr. Wolfgang Lindner Leichlingen, Germany ----- Original Message ----- From: "Dudley, Jeremy" To: "Dr. Wolfgang Lindner" ; "Gunter Königsmann" ; "Help Maxima" Sent: Saturday, April 18, 2015 1:04 PM Subject: RE: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted The screenshot seemed to be just the first part of the recent requirement to inform you that cookies are used. Sourceforge is free; ads help pay for the running costs. Accept the notice and you should move on to the download section. ________________________________________ From: Dr. Wolfgang Lindner [lindnerw@...] Sent: 18 April 2015 11:46 To: Gunter Königsmann; Help Maxima Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted Dear group, I tried to download the new maxima-sbcl windows version, but the page seems to be hiject from ad's .. so the download link could not be reached. See picture attached. Is there another place to get the installer? W. Dautermann's version from his homepage could be downloaded without problems. best Wolfgang -- Dr. Wolfgang Lindner Leichlingen, Germany | ----- Original Message ----- | From: "Gunter Königsmann" | To: "Wolfgang Dautermann" ; | | Sent: Saturday, April 18, 2015 10:28 AM | Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted | | | We should put this installer into the download section on sourceforge.net, | too. | | Kind regards, | | Gunter. | | Am 18. April 2015 10:19:42 MESZ, schrieb Wolfgang Dautermann | : | >Am 16.04.2015 um 23:07 schrieb Robert Dodier: | >> What is the result of: | >> | >> (encode-universal-time 0 0 0 1 1 1900 0) | >> | >> What about: | >> | >> (decode-universal-time 0 0) | > | >Maxima 5.36.0 http://maxima.sourceforge.net | >using Lisp CLISP 2.49 (2010-07-07) | >Distributed under the GNU Public License. See the file COPYING. | >Dedicated to the memory of William Schelter. | >The function bug_report() provides bug reporting information. | >(%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) | >0 | >(%i1) :lisp (decode-universal-time 0 0) | >0 | >0 | >0 | >1 | >1 | >1900 | >0 | >NIL | >0 | >(%i1) | > | >I assume, that is the expected result? | > | >Anyway, if someone is interested in the Clisp based crosscompiled | >installer (or if it helps solving the issue) - I have put it on my | >website: | >http://wolfgang.dautermann.at/maxima/ | > | >(of course with the build scripts which I used for generating it). | > | >The previous version (5.35.1) is still available. I do not want to | >keep a complete history of maxima windows installers on my website (as | >on sourceforge) but will provide the last two or three versions. | > | >Sorry for the delay. I am rather busy now organizing a local Linux | >event ("Grazer Linuxtage"), which will be on 24th and 25th of April. | > | >Best regards, Wolfgang | > | > | >------------------------------------------------------------------------------| ------------------------------------------------------------------------------------------To keep up to date with what's happening at WRc visithttp://www.wrcplc.co.uk/whats-going-on ------------------------------------------------------------------------------------------Visit our website http://www.wrcplc.co.uk as well as http://www.waterportfolio.com forcollaborative research projects. ------------------------------------------------------------------------------------------Follow us on Twitter: https://twitter.com/WRcplc, LinkedIn:http://www.linkedin.com/company/wrc-plc andLike Us on Facebook: http://www.facebook.com/pages/WRc-plc/288329784573893. ------------------------------------------------------------------------------------------The Information in this e-mail is confidential and is intended solely forthe addressee. Access to this e-mail by any other party is unauthorised. Ifyou are not the intended recipient, any disclosure, copying, distribution orany action taken in reliance on the information contained in this e-mail isprohibited and maybe unlawful. When addressed to WRc Clients, any opinionsor advice contained in this e-mail are subject to the terms and conditionsexpressed in the governing WRc Client Agreement. ------------------------------------------------------------------------------------------WRc plc is a company registered in England and Wales. Registered officeaddress: Frankland Road, Blagrove, Swindon, Wiltshire SN5 8YF. Companyregistration number 2262098. VAT number 527 1804 53. ------------------------------------------------------------------------------------------ ```
 Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted From: Dudley, Jeremy - 2015-04-18 11:28:53 ```The screenshot seemed to be just the first part of the recent requirement to inform you that cookies are used. Sourceforge is free; ads help pay for the running costs. Accept the notice and you should move on to the download section. ________________________________________ From: Dr. Wolfgang Lindner [lindnerw@...] Sent: 18 April 2015 11:46 To: Gunter Königsmann; Help Maxima Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted Dear group, I tried to download the new maxima-sbcl windows version, but the page seems to be hiject from ad's .. so the download link could not be reached. See picture attached. Is there another place to get the installer? W. Dautermann's version from his homepage could be downloaded without problems. best Wolfgang -- Dr. Wolfgang Lindner Leichlingen, Germany | ----- Original Message ----- | From: "Gunter Königsmann" | To: "Wolfgang Dautermann" ; | | Sent: Saturday, April 18, 2015 10:28 AM | Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted | | | We should put this installer into the download section on sourceforge.net, | too. | | Kind regards, | | Gunter. | | Am 18. April 2015 10:19:42 MESZ, schrieb Wolfgang Dautermann | : | >Am 16.04.2015 um 23:07 schrieb Robert Dodier: | >> What is the result of: | >> | >> (encode-universal-time 0 0 0 1 1 1900 0) | >> | >> What about: | >> | >> (decode-universal-time 0 0) | > | >Maxima 5.36.0 http://maxima.sourceforge.net | >using Lisp CLISP 2.49 (2010-07-07) | >Distributed under the GNU Public License. See the file COPYING. | >Dedicated to the memory of William Schelter. | >The function bug_report() provides bug reporting information. | >(%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) | >0 | >(%i1) :lisp (decode-universal-time 0 0) | >0 | >0 | >0 | >1 | >1 | >1900 | >0 | >NIL | >0 | >(%i1) | > | >I assume, that is the expected result? | > | >Anyway, if someone is interested in the Clisp based crosscompiled | >installer (or if it helps solving the issue) - I have put it on my | >website: | >http://wolfgang.dautermann.at/maxima/ | > | >(of course with the build scripts which I used for generating it). | > | >The previous version (5.35.1) is still available. I do not want to | >keep a complete history of maxima windows installers on my website (as | >on sourceforge) but will provide the last two or three versions. | > | >Sorry for the delay. I am rather busy now organizing a local Linux | >event ("Grazer Linuxtage"), which will be on 24th and 25th of April. | > | >Best regards, Wolfgang | > | > | >------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------ To keep up to date with what's happening at WRc visit http://www.wrcplc.co.uk/whats-going-on ------------------------------------------------------------------------------------------ Visit our website http://www.wrcplc.co.uk as well as http://www.waterportfolio.com for collaborative research projects. ------------------------------------------------------------------------------------------ Follow us on Twitter: https://twitter.com/WRcplc, LinkedIn: http://www.linkedin.com/company/wrc-plc and Like Us on Facebook: http://www.facebook.com/pages/WRc-plc/288329784573893. ------------------------------------------------------------------------------------------ The Information in this e-mail is confidential and is intended solely for the addressee. Access to this e-mail by any other party is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on the information contained in this e-mail is prohibited and maybe unlawful. When addressed to WRc Clients, any opinions or advice contained in this e-mail are subject to the terms and conditions expressed in the governing WRc Client Agreement. ------------------------------------------------------------------------------------------ WRc plc is a company registered in England and Wales. Registered office address: Frankland Road, Blagrove, Swindon, Wiltshire SN5 8YF. Company registration number 2262098. VAT number 527 1804 53. ------------------------------------------------------------------------------------------ ```
 [Maxima-discuss] R: Maxima 5.36.0 rpms & tar.gz posted From: Marco Verpelli - 2015-04-18 11:04:39 ```That is a cookies notice, mandatory in Europe, not adversiting. Marco -----Messaggio originale----- Da: Dr. Wolfgang Lindner [mailto:lindnerw@...] Inviato: sabato 18 aprile 2015 12:46 A: Gunter Königsmann; Help Maxima Oggetto: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted Dear group, I tried to download the new maxima-sbcl windows version, but the page seems to be hiject from ad's .. so the download link could not be reached. See picture attached. Is there another place to get the installer? W. Dautermann's version from his homepage could be downloaded without problems. best Wolfgang -- Dr. Wolfgang Lindner Leichlingen, Germany | ----- Original Message ----- | From: "Gunter Königsmann" | To: "Wolfgang Dautermann" ; | | Sent: Saturday, April 18, 2015 10:28 AM | Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted | | | We should put this installer into the download section on | sourceforge.net, too. | | Kind regards, | | Gunter. | | Am 18. April 2015 10:19:42 MESZ, schrieb Wolfgang Dautermann | : | >Am 16.04.2015 um 23:07 schrieb Robert Dodier: | >> What is the result of: | >> | >> (encode-universal-time 0 0 0 1 1 1900 0) | >> | >> What about: | >> | >> (decode-universal-time 0 0) | > | >Maxima 5.36.0 http://maxima.sourceforge.net using Lisp CLISP 2.49 | >(2010-07-07) Distributed under the GNU Public License. See the file | >COPYING. | >Dedicated to the memory of William Schelter. | >The function bug_report() provides bug reporting information. | >(%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) | >0 | >(%i1) :lisp (decode-universal-time 0 0) | >0 | >0 | >0 | >1 | >1 | >1900 | >0 | >NIL | >0 | >(%i1) | > | >I assume, that is the expected result? | > | >Anyway, if someone is interested in the Clisp based crosscompiled | >installer (or if it helps solving the issue) - I have put it on my | >website: | >http://wolfgang.dautermann.at/maxima/ | > | >(of course with the build scripts which I used for generating it). | > | >The previous version (5.35.1) is still available. I do not want to | >keep a complete history of maxima windows installers on my website | >(as on sourceforge) but will provide the last two or three versions. | > | >Sorry for the delay. I am rather busy now organizing a local Linux | >event ("Grazer Linuxtage"), which will be on 24th and 25th of April. | > | >Best regards, Wolfgang | > | > | >------------------------------------------------------------------------------ | ```
 Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted From: Dr. Wolfgang Lindner - 2015-04-18 10:47:06 Attachments: maxima-download-page1.png ```Dear group, I tried to download the new maxima-sbcl windows version, but the page seems to be hiject from ad's .. so the download link could not be reached. See picture attached. Is there another place to get the installer? W. Dautermann's version from his homepage could be downloaded without problems. best Wolfgang -- Dr. Wolfgang Lindner Leichlingen, Germany | ----- Original Message ----- | From: "Gunter Königsmann" | To: "Wolfgang Dautermann" ; | | Sent: Saturday, April 18, 2015 10:28 AM | Subject: Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted | | | We should put this installer into the download section on sourceforge.net, | too. | | Kind regards, | | Gunter. | | Am 18. April 2015 10:19:42 MESZ, schrieb Wolfgang Dautermann | : | >Am 16.04.2015 um 23:07 schrieb Robert Dodier: | >> What is the result of: | >> | >> (encode-universal-time 0 0 0 1 1 1900 0) | >> | >> What about: | >> | >> (decode-universal-time 0 0) | > | >Maxima 5.36.0 http://maxima.sourceforge.net | >using Lisp CLISP 2.49 (2010-07-07) | >Distributed under the GNU Public License. See the file COPYING. | >Dedicated to the memory of William Schelter. | >The function bug_report() provides bug reporting information. | >(%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) | >0 | >(%i1) :lisp (decode-universal-time 0 0) | >0 | >0 | >0 | >1 | >1 | >1900 | >0 | >NIL | >0 | >(%i1) | > | >I assume, that is the expected result? | > | >Anyway, if someone is interested in the Clisp based crosscompiled | >installer (or if it helps solving the issue) - I have put it on my | >website: | >http://wolfgang.dautermann.at/maxima/ | > | >(of course with the build scripts which I used for generating it). | > | >The previous version (5.35.1) is still available. I do not want to | >keep a complete history of maxima windows installers on my website (as | >on sourceforge) but will provide the last two or three versions. | > | >Sorry for the delay. I am rather busy now organizing a local Linux | >event ("Grazer Linuxtage"), which will be on 24th and 25th of April. | > | >Best regards, Wolfgang | > | > | >------------------------------------------------------------------------------ | ```
 Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) From: David Scherfgen - 2015-04-18 10:21:30 Attachments: Message as HTML ```I wasn't suggesting that logabs should be turned on by default. My point was that if the option is provided, then it should behave consistently and give the same answer for sin(x)/cos(x) and tan(x), etc. Further, the Maxima manual entry for logabs says: > For definite integration, the logabs:true setting is used, because here > "evaluation" of the indefinite integral at the endpoints is often needed. Shouldn't it be possible then to find an example where, for some limits a, b, something like integrate(sin(x)/cos(x),x,a,b) would give a different answer than integrate(tan(x),x,a,b)? Best regards, David 2015-04-18 8:29 GMT+02:00 Gunter Königsmann : > Correctness is important. But sometimes I wonder if there is a way to make > maxima tell the user that it refuses to do something that *looks* obvious > since it is fundamentally incorrect. Let the computer help with at least > part of the teaching? I assume there is no possibility to do so, though. > And if there were any it would probably mean loads of bogus warnings. > > Kind regards, > > Gunter. > > Am 17. April 2015 23:49:59 MESZ, schrieb Raymond Toy < > toy.raymond@...>: >> >> "Barton" == Barton Willis writes: >>>>>>> >>>>>> >> Barton> Telling calculus students that integrate(1/x,x) = >> Barton> log(abs(x)) is somewhat slothful. If we didn't conflate >> Barton> functions and their formula, maybe it would be a better >> Barton> world: >> >> >> Barton> integrate(x in (-inf,0) --> 1/x) = x in (-inf 0) --> log(-x), (1) >> >> Barton> integrate(x in (0,inf) --> 1/x) = x in (0, inf) --> log(x), (2) >> >> Barton> integrate(x in [-1,1]) --> 1/x) = bogus (3) >> >> >> >> Barton> Surely a student should look at the limits of integration >> Barton> and choose between (1), (2), or (3). The logabs issue >> Barton> comes up every so often. Users want answers that match US >> Barton> calculus textbooks--I can understand that point of >> Barton> view. But it does eliminate a teachable moment. >> >> I'm sure many people disagree with me, but I've always felt maxima >> should default to correctness, even if that means those high school >> and college students don't get the answer they expect. (Because >> they've been taught the wrong thing or because they don't remember.) >> >> I guess a corollary is not catering to beginners too much; you're only >> a beginner once, so let's educate them so they're not beginners >> anymore. >> >> -- >> Ray >> >> >> ------------------------------ >> >> BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >> Develop your own process in accordance with the BPMN 2 standard >> Learn Process modeling best practices with Bonita BPM through live exercises >> http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ >> source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >> ------------------------------ >> >> Maxima-discuss mailing list >> Maxima-discuss@... >> https://lists.sourceforge.net/lists/listinfo/maxima-discuss >> >> > -- > Diese Nachricht wurde von meinem Mobiltelefon mit Kaiten Mail gesendet. > > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live > exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- > event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > _______________________________________________ > Maxima-discuss mailing list > Maxima-discuss@... > https://lists.sourceforge.net/lists/listinfo/maxima-discuss > > ```
 [Maxima-discuss] integrate(cot(x),x,0,inf) --> crash From: David Scherfgen - 2015-04-18 10:15:32 Attachments: Message as HTML ```Hi, in the current Git version, the following makes Maxima crash: integrate(cot(x),x,0,inf); The full output: Maxima branch_5_36_base_24_g18abe6c http://maxima.sourceforge.net using Lisp SBCL 1.0.55.0.debian Distributed under the GNU Public License. See the file COPYING. Dedicated to the memory of William Schelter. The function bug_report() provides bug reporting information. (%i1) integrate(cot(x),x,0,inf); INFO: Control stack guard page unprotected Control stack guard page temporarily disabled: proceed with caution Maxima encountered a Lisp error: Control stack exhausted (no more space for function call frames). This is probably due to heavily nested or infinitely recursive function calls, or a tail call that SBCL cannot or has not optimized away. PROCEED WITH CAUTION. Automatically continuing. To enable the Lisp debugger set *debugger-hook* to nil. Older Maxima versions give the correct output: (%i1) integrate(cot(x),x,0,inf); defint: integral is divergent. -- an error. To debug this try: debugmode(true); Best regards, David ```
 Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted From: Gunter Königsmann - 2015-04-18 08:28:50 Attachments: Message as HTML ```We should put this installer into the download section on sourceforge.net, too. Kind regards, Gunter. Am 18. April 2015 10:19:42 MESZ, schrieb Wolfgang Dautermann : >Am 16.04.2015 um 23:07 schrieb Robert Dodier: >> What is the result of: >> >> (encode-universal-time 0 0 0 1 1 1900 0) >> >> What about: >> >> (decode-universal-time 0 0) > >Maxima 5.36.0 http://maxima.sourceforge.net >using Lisp CLISP 2.49 (2010-07-07) >Distributed under the GNU Public License. See the file COPYING. >Dedicated to the memory of William Schelter. >The function bug_report() provides bug reporting information. >(%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) >0 >(%i1) :lisp (decode-universal-time 0 0) >0 >0 >0 >1 >1 >1900 >0 >NIL >0 >(%i1) > >I assume, that is the expected result? > >Anyway, if someone is interested in the Clisp based crosscompiled >installer (or if it helps solving the issue) - I have put it on my >website: >http://wolfgang.dautermann.at/maxima/ > >(of course with the build scripts which I used for generating it). > >The previous version (5.35.1) is still available. I do not want to >keep a complete history of maxima windows installers on my website (as >on sourceforge) but will provide the last two or three versions. > >Sorry for the delay. I am rather busy now organizing a local Linux >event ("Grazer Linuxtage"), which will be on 24th and 25th of April. > >Best regards, Wolfgang > > >------------------------------------------------------------------------------ >BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >Develop your own process in accordance with the BPMN 2 standard >Learn Process modeling best practices with Bonita BPM through live >exercises >http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- >event?utm_ >source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >_______________________________________________ >Maxima-discuss mailing list >Maxima-discuss@... >https://lists.sourceforge.net/lists/listinfo/maxima-discuss -- Diese Nachricht wurde von meinem Mobiltelefon mit Kaiten Mail gesendet.```
 Re: [Maxima-discuss] Maxima 5.36.0 rpms & tar.gz posted From: Wolfgang Dautermann - 2015-04-18 08:19:53 ```Am 16.04.2015 um 23:07 schrieb Robert Dodier: > What is the result of: > > (encode-universal-time 0 0 0 1 1 1900 0) > > What about: > > (decode-universal-time 0 0) Maxima 5.36.0 http://maxima.sourceforge.net using Lisp CLISP 2.49 (2010-07-07) Distributed under the GNU Public License. See the file COPYING. Dedicated to the memory of William Schelter. The function bug_report() provides bug reporting information. (%i1) :lisp (encode-universal-time 0 0 0 1 1 1900 0) 0 (%i1) :lisp (decode-universal-time 0 0) 0 0 0 1 1 1900 0 NIL 0 (%i1) I assume, that is the expected result? Anyway, if someone is interested in the Clisp based crosscompiled installer (or if it helps solving the issue) - I have put it on my website: http://wolfgang.dautermann.at/maxima/ (of course with the build scripts which I used for generating it). The previous version (5.35.1) is still available. I do not want to keep a complete history of maxima windows installers on my website (as on sourceforge) but will provide the last two or three versions. Sorry for the delay. I am rather busy now organizing a local Linux event ("Grazer Linuxtage"), which will be on 24th and 25th of April. Best regards, Wolfgang ```
 Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) From: Gunter Königsmann - 2015-04-18 06:29:26 Attachments: Message as HTML ```Correctness is important. But sometimes I wonder if there is a way to make maxima tell the user that it refuses to do something that *looks* obvious since it is fundamentally incorrect. Let the computer help with at least part of the teaching? I assume there is no possibility to do so, though. And if there were any it would probably mean loads of bogus warnings. Kind regards, Gunter. Am 17. April 2015 23:49:59 MESZ, schrieb Raymond Toy : >>>>>> "Barton" == Barton Willis writes: > > Barton> Telling calculus students that integrate(1/x,x) = > Barton> log(abs(x)) is  somewhat slothful.  If we didn't conflate > Barton> functions and their formula, maybe it would be a better > Barton> world: > > >Barton>     integrate(x in (-inf,0) --> 1/x) = x in (-inf 0) --> >log(-x),     (1) > >Barton>     integrate(x in (0,inf) --> 1/x) = x in (0, inf) --> >log(x),        (2) > >Barton>     integrate(x in [-1,1]) --> 1/x) = bogus                     >                 (3) > > > > Barton> Surely a student should look at the limits of integration > Barton> and choose between (1), (2), or (3). The logabs issue > Barton> comes up every so often. Users want answers that match US > Barton> calculus textbooks--I can understand that point of > Barton> view. But it does eliminate a teachable moment. > >I'm sure many people disagree with me, but I've always felt maxima >should default to correctness, even if that means those high school >and college students don't get the answer they expect. (Because >they've been taught the wrong thing or because they don't remember.) > >I guess a corollary is not catering to beginners too much; you're only >a beginner once, so let's educate them so they're not beginners >anymore. > >-- >Ray > > >------------------------------------------------------------------------------ >BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT >Develop your own process in accordance with the BPMN 2 standard >Learn Process modeling best practices with Bonita BPM through live >exercises >http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- >event?utm_ >source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >_______________________________________________ >Maxima-discuss mailing list >Maxima-discuss@... >https://lists.sourceforge.net/lists/listinfo/maxima-discuss -- Diese Nachricht wurde von meinem Mobiltelefon mit Kaiten Mail gesendet.```
 Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) From: Raymond Toy - 2015-04-17 21:50:25 ```>>>>> "Barton" == Barton Willis writes: Barton> Telling calculus students that integrate(1/x,x) = Barton> log(abs(x)) is  somewhat slothful.  If we didn't conflate Barton> functions and their formula, maybe it would be a better Barton> world: Barton>     integrate(x in (-inf,0) --> 1/x) = x in (-inf 0) --> log(-x),     (1) Barton>     integrate(x in (0,inf) --> 1/x) = x in (0, inf) --> log(x),        (2) Barton>     integrate(x in [-1,1]) --> 1/x) = bogus                                      (3) Barton> Surely a student should look at the limits of integration Barton> and choose between (1), (2), or (3). The logabs issue Barton> comes up every so often. Users want answers that match US Barton> calculus textbooks--I can understand that point of Barton> view. But it does eliminate a teachable moment. I'm sure many people disagree with me, but I've always felt maxima should default to correctness, even if that means those high school and college students don't get the answer they expect. (Because they've been taught the wrong thing or because they don't remember.) I guess a corollary is not catering to beginners too much; you're only a beginner once, so let's educate them so they're not beginners anymore. -- Ray ```
 [Maxima-discuss] ccl build on windows From: Gunter Königsmann - 2015-04-17 19:46:26 Attachments: Message as HTML ```I assume I found an error in the CCL version that is used in the current windows installer: %i1 load("engineering-format")\$ %i2 0.5; %o2 5.0*10^-7 SBCL and GCL did always show 500.0E-3 in this case: engineering-format.lisp tries to make all floats have exponents dividable by 3 when printed. Kind regards, Gunter. ```
 Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) From: Barton Willis - 2015-04-17 19:33:20 Attachments: Message as HTML ```Telling calculus students that integrate(1/x,x) = log(abs(x)) is somewhat slothful. If we didn't conflate functions and their formula, maybe it would be a better world: integrate(x in (-inf,0) --> 1/x) = x in (-inf 0) --> log(-x), (1) integrate(x in (0,inf) --> 1/x) = x in (0, inf) --> log(x), (2) integrate(x in [-1,1]) --> 1/x) = bogus (3) Surely a student should look at the limits of integration and choose between (1), (2), or (3). The logabs issue comes up every so often. Users want answers that match US calculus textbooks--I can understand that point of view. But it does eliminate a teachable moment. --Barton ________________________________ From: Richard Fateman Sent: Friday, April 17, 2015 12:38 To: maxima-discuss@... Subject: Re: [Maxima-discuss] logabs: inconsistent behavior cos(x)/sin(x) vs. cot(x) Here's another fix. Remove logabs flag from Maxima. It has some questionable properties. For example w: 1/(1-x)+1/(x-1) integrate( 1/w,x), logabs:true; results in an unevaluated integral. (!) leaving off the logabs:true, integrate gets log(1-x)+log(x-1) which is... a constant. Given that some people do not know about complex numbers and would prefer log to be defined only for non-negative argument, why restrict this to the result of integration? If you want log to be log(abs()), then define something like this... logabsify(z):=subst(lambda([%r],log(abs(%r))),'log,z); try logabsify(log(3)+log(q); logabsify(log(3)+log(x-1)+log(1-x)); oh, here's a bug... since w, above is zero, maybe integrate(w,x,0,10) should not say "integral is divergent". Though integrate(w,x,-10,10) comes out as zero. RJF On 4/17/2015 8:25 AM, Barton Willis wrote: > I imagine that Maxima uses a lookup table for simple functions, and that in the case of cot(x), tan(x), coth(x) and tanh(x) the lookup entry > just doesn't take into account the logabs setting. There might be special cases, but this is more true than false: the operators %cot %tan, %tanh, and %coth all have the integral symbol property. At the top level of integration, Maxima tries the derivative divides rule for these operators. You can check for this symbol property using (%i3) :lisp(mapcar #'(lambda (x) (get x 'integral"")) (list '%cot '%tan '%tanh '%coth)) (((X) ((%LOG) ((%SIN) X))) ((X) ((%LOG) ((%SEC) X))) ((X) ((%LOG) ((%COSH) X))) ((X) ((%LOG) ((%SINH) X)))) The symbol properties can be changed: (%i3) :lisp(putprop '%coth `((x) ,#'coth-integral) 'integral)); ((X) (LAMBDA-BLOCK COTH-INTEGRAL (X) (TAKE '(%LOG) (IF \$LOGABS (TAKE '(MABS) (TAKE '(%SINH) X)) (TAKE '(%SINH) X))))) (%i3) integrate(coth(x),x), logabs : false; (%o3) log(sinh(x)) (%i4) integrate(coth(x),x), logabs : true; (%o4) log(abs(sinh(x))) I understand the desire to make results match calculus textbooks--it's a worthy goal. But the absolute value also makes things wrong everywhere in the complex plane--thus the user option logabs. Maybe somebody would like to fix up the symbol properties to take in account logabs. --Barton ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Maxima-discuss mailing list Maxima-discuss@... https://lists.sourceforge.net/lists/listinfo/maxima-discuss ```

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