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From: SourceForge.net <noreply@so...>  20110805 23:59:58

Bugs item #3387081, was opened at 20110805 18:59 Message generated for change (Tracker Item Submitted) made by willisbl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387081&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Limit Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: question from limit involving a float Initial Comment: The limit code has far too much code that fills the fact data base with comparisons to 1.0*10^8 or 1.0*10^8. One of these silly facts leaks out: (%i16) integrate( t*exp((ta)^2), t)$ Silly question: (%i17) limit(%,t,minf); "Is "t+a+1.0*10^8" positive or negative?"neg; (%o17) 0 (%i18) build_info(); Maxima version: 5.25.0 Maxima build date: 12:0 8/2/2011 Host type: i686pcmingw32 Lisp implementation type: Clozure Common Lisp Lisp implementation version: Version 1.7r14925M (WindowsX8632) (%o18)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387081&group_id=4933 
From: SourceForge.net <noreply@so...>  20110805 22:04:04

Bugs item #3387042, was opened at 20110806 02:04 Message generated for change (Tracker Item Submitted) made by kpf You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387042&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Petr Kartsev (kpf) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(x exp(x^2)) : strange jump Initial Comment: (%i1) integrate( t*exp((ta)^2), t, inf, x); (%o1) (gamma_incomplete(1/2,x^22*a*x+a^2)*a*x)/(2*abs(xa))+(gamma_incomplete(1/2,x^22*a*x+a^2)*a^2)/(2*abs(xa))gamma_incomplete(1,x^22*a*x+a^2)/2 (1st part on screenshot) why is it so complex? when plotting this integral, it has strange jump at point x=1 (and even becomes negative) while the integrand is smooth and mostly always positive) (%i2) plot2d([x*exp((x1)^2), integrate(t*exp((t1)^2), t, inf,x)], [x,5,5])$ (2nd part on screenshot) However, if I simply add and subtract unity, the actual result is recovered: (%i3) integrate( (t1)*exp((t1)^2), t, inf, x)+ integrate( exp((t1)^2), t, inf, x); (%o3) (sqrt(%pi)*erf(x1))/2%e^(x^2+2*x1)/2+sqrt(%pi)/2 (3rd part on screenshot) Looks like additional signum or abs takes place somewhere? Sorry for not giving solution, I am not that skillful in lisp... Thanks for good system, anyway! :)  Maxima version: 5.24.0 Maxima build date: 10:35 8/1/2011 Host type: x86_64pclinuxgnu Lisp implementation type: SBCL Lisp implementation version: 1.0.19gentoo  PS. Just for information, if this can help, run_testsuite() gives 1 error. May be just my installation is wrong? Running tests in rtest16: ********************** Problem 386 *************** Input: closeto(zeta(%i + 3)  (1.10721440843141  .1482908671781754 %i), 1.e15) Result: 3.3157171357748244e9 This differed from the expected result: true   You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387042&group_id=4933 
From: SourceForge.net <noreply@so...>  20110805 21:43:36

Bugs item #3387024, was opened at 20110806 00:43 Message generated for change (Tracker Item Submitted) made by kpf You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387024&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Plotting Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Petr Kartsev (kpf) Assigned to: Nobody/Anonymous (nobody) Summary: not plotting from Vista, probably due to national characters Initial Comment: Sorry if not found in Documentation  I can't plot anything in freshlyinstalled MaximaWindows 5.25 on my Vista. (%1) wxplot2d([x*exp(x*x)], [x,5,5]); wxMaxima, and xMaxima, started as normal user Maxima encountered a Lisp error: Permission denied : #P"C:/Users/EIO/92483986.tem" % these are nonlatin Russian characters Automatically continuing. To enable the Lisp debugger set *debuggerhook* to nil. In case if program needed more permissions, I tried starting wxMaxima as Administrator util.c: No such file or directory and inline picture crossed as mail envelope with text: Error C:/Users/{user login}/maxout_1.png  Maxima version: 5.25.0 Maxima build date: 12:0 8/2/2011 Host type: i686pcmingw32 Lisp implementation type: Clozure Common Lisp Lisp implementation version: Version 1.7r14925M (WindowsX8632)  If needed, I can attach screenshots. And sorry again if I missed something in Documentation. Sincerely! Petr.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387024&group_id=4933 
From: SourceForge.net <noreply@so...>  20110805 06:59:08

Bugs item #3386573, was opened at 20110805 09:59 Message generated for change (Tracker Item Submitted) made by aleksasd You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3386573&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Integration Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Aleksas (aleksasd) Assigned to: Nobody/Anonymous (nobody) Summary: integrate problems Initial Comment: (%i1) integrate(log(cos(x)),x,0,%pi/2); defint: integral is divergent.  an error. To debug this try: debugmode(true); The result should be 1/2*%pi*log(2) (%i2) integrate(log(2*cos(x)),x,0,%pi/2); defint: integral is divergent.  an error. To debug this try: debugmode(true); The result should be 0 (%i3) integrate(log(sin(2*x)),x,0,%pi/2); defint: integral is divergent.  an error. To debug this try: debugmode(true); The result should be 1/2*%pi*log(2) (%i4) integrate(log(sin(x)),x,0,%pi/2); (%o4) integrate(log(sin(x)),x,0,%pi/2) The result should be 1/2*%pi*log(2) (%i5) integrate(x*cot(x),x,0,%pi/2); (%o5) integrate(x*cot(x),x,0,%pi/2) The result should be 1/2*%pi*log(2) (%i6) integrate(x^2/sin(x)^2,x,0,%pi/2); (%o6) integrate(x^2/sin(x)^2,x,0,%pi/2) The result should be %pi*log(2) (%i7) integrate(asin(x)/x,x,0,1); (%o7) integrate(asin(x)/x,x,0,1) The result should be 1/2*%pi*log(2) (%i8) build_info()$ Maxima version: 5.25.0 Maxima build date: 12:0 8/2/2011 Host type: i686pcmingw32 Lisp implementation type: Clozure Common Lisp Lisp implementation version: Version 1.7r14925M (WindowsX8632)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3386573&group_id=4933 