You can subscribe to this list here.
2002 
_{Jan}

_{Feb}

_{Mar}

_{Apr}

_{May}

_{Jun}
(67) 
_{Jul}
(61) 
_{Aug}
(49) 
_{Sep}
(43) 
_{Oct}
(59) 
_{Nov}
(24) 
_{Dec}
(18) 

2003 
_{Jan}
(34) 
_{Feb}
(35) 
_{Mar}
(72) 
_{Apr}
(42) 
_{May}
(46) 
_{Jun}
(15) 
_{Jul}
(64) 
_{Aug}
(62) 
_{Sep}
(22) 
_{Oct}
(41) 
_{Nov}
(57) 
_{Dec}
(56) 
2004 
_{Jan}
(48) 
_{Feb}
(47) 
_{Mar}
(33) 
_{Apr}
(39) 
_{May}
(6) 
_{Jun}
(17) 
_{Jul}
(19) 
_{Aug}
(10) 
_{Sep}
(14) 
_{Oct}
(74) 
_{Nov}
(80) 
_{Dec}
(22) 
2005 
_{Jan}
(43) 
_{Feb}
(33) 
_{Mar}
(52) 
_{Apr}
(74) 
_{May}
(32) 
_{Jun}
(58) 
_{Jul}
(18) 
_{Aug}
(41) 
_{Sep}
(71) 
_{Oct}
(28) 
_{Nov}
(65) 
_{Dec}
(68) 
2006 
_{Jan}
(54) 
_{Feb}
(37) 
_{Mar}
(82) 
_{Apr}
(211) 
_{May}
(69) 
_{Jun}
(75) 
_{Jul}
(279) 
_{Aug}
(139) 
_{Sep}
(135) 
_{Oct}
(58) 
_{Nov}
(81) 
_{Dec}
(78) 
2007 
_{Jan}
(141) 
_{Feb}
(134) 
_{Mar}
(65) 
_{Apr}
(49) 
_{May}
(61) 
_{Jun}
(90) 
_{Jul}
(72) 
_{Aug}
(53) 
_{Sep}
(86) 
_{Oct}
(61) 
_{Nov}
(62) 
_{Dec}
(101) 
2008 
_{Jan}
(100) 
_{Feb}
(66) 
_{Mar}
(76) 
_{Apr}
(95) 
_{May}
(77) 
_{Jun}
(93) 
_{Jul}
(103) 
_{Aug}
(76) 
_{Sep}
(42) 
_{Oct}
(55) 
_{Nov}
(44) 
_{Dec}
(75) 
2009 
_{Jan}
(103) 
_{Feb}
(105) 
_{Mar}
(121) 
_{Apr}
(59) 
_{May}
(103) 
_{Jun}
(82) 
_{Jul}
(67) 
_{Aug}
(76) 
_{Sep}
(85) 
_{Oct}
(75) 
_{Nov}
(181) 
_{Dec}
(133) 
2010 
_{Jan}
(107) 
_{Feb}
(116) 
_{Mar}
(145) 
_{Apr}
(89) 
_{May}
(138) 
_{Jun}
(85) 
_{Jul}
(82) 
_{Aug}
(111) 
_{Sep}
(70) 
_{Oct}
(83) 
_{Nov}
(60) 
_{Dec}
(16) 
2011 
_{Jan}
(61) 
_{Feb}
(16) 
_{Mar}
(52) 
_{Apr}
(41) 
_{May}
(34) 
_{Jun}
(41) 
_{Jul}
(57) 
_{Aug}
(73) 
_{Sep}
(21) 
_{Oct}
(45) 
_{Nov}
(50) 
_{Dec}
(28) 
2012 
_{Jan}
(70) 
_{Feb}
(36) 
_{Mar}
(71) 
_{Apr}
(29) 
_{May}
(48) 
_{Jun}
(61) 
_{Jul}
(44) 
_{Aug}
(54) 
_{Sep}
(20) 
_{Oct}
(28) 
_{Nov}
(41) 
_{Dec}
(137) 
2013 
_{Jan}
(62) 
_{Feb}
(55) 
_{Mar}
(31) 
_{Apr}
(23) 
_{May}
(54) 
_{Jun}
(54) 
_{Jul}
(90) 
_{Aug}
(46) 
_{Sep}
(38) 
_{Oct}
(60) 
_{Nov}
(92) 
_{Dec}
(17) 
2014 
_{Jan}
(62) 
_{Feb}
(35) 
_{Mar}
(72) 
_{Apr}
(30) 
_{May}
(97) 
_{Jun}
(81) 
_{Jul}
(63) 
_{Aug}
(64) 
_{Sep}
(28) 
_{Oct}
(27) 
_{Nov}

_{Dec}

S  M  T  W  T  F  S 



1

2
(6) 
3
(10) 
4
(2) 
5
(2) 
6
(5) 
7
(9) 
8
(2) 
9
(8) 
10
(4) 
11
(6) 
12
(4) 
13

14

15
(4) 
16

17
(2) 
18

19
(2) 
20
(3) 
21
(2) 
22
(5) 
23

24
(3) 
25
(2) 
26

27
(4) 
28
(5) 
29
(2) 
30
(6) 
31
(2) 


From: SourceForge.net <noreply@so...>  20080111 18:34:35

Bugs item #1869597, was opened at 20080111 13:34 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869597&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  Simplification Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: bfloat with factorials adds spurious factor Initial Comment: bfloat(1.0b0!/2.0b0!) returns 1.0b0*1.0b0!/2.0b0!  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869597&group_id=4933 
From: SourceForge.net <noreply@so...>  20080111 15:49:41

Bugs item #1850726, was opened at 20071214 07:03 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1850726&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: Closed >Resolution: Fixed Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: quadpack fcns need abs err argument, was: quad_qag error Initial Comment: Hi, The command quad_qag(legendre_p(2,x),x,0,1,3) reports an abnormal return, although the integral is very simple. The result is right. Regards, M.A.  >Comment By: Raymond Toy (rtoy) Date: 20080111 10:49 Message: Logged In: YES user_id=28849 Originator: NO Support for abs err argument added. See quadpack.lisp, rev 1.10 and related checkins. Now we get quad_qag(legendre_p(2,x),x,0,1,3,'epsabs = 1d12) > [2.0e17, 4.28e15, 31, 0] Closing report.  Comment By: Raymond Toy (rtoy) Date: 20080103 13:51 Message: Logged In: YES user_id=28849 Originator: NO Further investigation indicates that the problem is not caused by epsabs being 0. The first call to dqk31 (because key = 3) is telling quadpack that the integral suffers from roundoff. Using the adaptive quad_qags routine doesn't help either because the first call to dqk21 indicates roundoff error already and no further progress is made. Nevertheless, we should allow an epsabs argument.  Comment By: Robert Dodier (robert_dodier) Date: 20071229 13:37 Message: Logged In: YES user_id=501686 Originator: NO Agreed w/ Ray T on both counts: current behavior is correct, and quad_qag and friends should accept an absolute error argument. Since the original Fortran QUADPACK functions accept an absolute error argument, all that Maxima quadpack need to do is to pass the argument. Changing title of this report accordingly.  Comment By: Raymond Toy (rtoy) Date: 20071217 09:58 Message: Logged In: YES user_id=28849 Originator: NO Maxima says integrate(legendre_p(2,x),x,0,1) is 0. quad_qag says [2.0e17, 4.28e15, 31, 2]. That is, the integral is 2e17. The abnormal return code is 2, which is excessive roundoff. I think this is correct because the default relative error is 1e8 but the absolute error is 0. I think quad_qag (and friends) probably should allow another arg to let the user specify the desired absolute error. And quad_qag probably shouldn't set the absolute error to 0; perhaps something more like doublefloatepsilon (about 1e16) should be used instead.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1850726&group_id=4933 
From: SourceForge.net <noreply@so...>  20080111 15:23:48

Bugs item #1869296, was opened at 20080111 07:01 Message generated for change (Comment added) made by willisbl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&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: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([1,2],[6],1) bogus Initial Comment: (%i248) hgfred([1,2],[6],1); (%o248) (5*(2/((11)^3*1)+4/((11)^2*1^2)12/((11)*1^3)(24*log(11))/1^424/1^4(24*log(11)*(11))/1^5)*(11)^3)/6 (%i249) ratsimp(%); log(0) has been generated. The correct result is a quotient of products of gamma functions.  >Comment By: Barton Willis (willisbl) Date: 20080111 09:23 Message: Logged In: YES user_id=895922 Originator: YES 5/3 is the correct value; in general, we have A&S 15.1.20, page 556: http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP?Res=150&Page=556 >I still think that hgfred is intended for simplification without numerical >evaluation. I agree. If would be OK with me if hgfred returned a nounform for things like hgfred([1,2],[6],1). It's just that I don't like it when hgfred returns something that is bogus.  Comment By: Raymond Toy (rtoy) Date: 20080111 09:07 Message: Logged In: YES user_id=28849 Originator: NO What is the answer supposed to be? Do you know what hgfred([1,2],[6],x) is supposed to return? limit(hgfred([1,2],[6],x),x,1) > 5/3. Based on the code, it computes hgfred([1,2],[6],x) in terms of hgfred([1,1],[2],x) by appropriate differentiation. (See derivint and comments in hyp.lisp.) Since hgfred([1,1],[2],x) is log(1x)/x, I don't see how gamma functions appear. I still think that hgfred is intended for simplification without numerical evaluation.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&group_id=4933 
From: SourceForge.net <noreply@so...>  20080111 15:07:10

Bugs item #1869296, was opened at 20080111 08:01 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&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: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([1,2],[6],1) bogus Initial Comment: (%i248) hgfred([1,2],[6],1); (%o248) (5*(2/((11)^3*1)+4/((11)^2*1^2)12/((11)*1^3)(24*log(11))/1^424/1^4(24*log(11)*(11))/1^5)*(11)^3)/6 (%i249) ratsimp(%); log(0) has been generated. The correct result is a quotient of products of gamma functions.  >Comment By: Raymond Toy (rtoy) Date: 20080111 10:07 Message: Logged In: YES user_id=28849 Originator: NO What is the answer supposed to be? Do you know what hgfred([1,2],[6],x) is supposed to return? limit(hgfred([1,2],[6],x),x,1) > 5/3. Based on the code, it computes hgfred([1,2],[6],x) in terms of hgfred([1,1],[2],x) by appropriate differentiation. (See derivint and comments in hyp.lisp.) Since hgfred([1,1],[2],x) is log(1x)/x, I don't see how gamma functions appear. I still think that hgfred is intended for simplification without numerical evaluation.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&group_id=4933 
From: SourceForge.net <noreply@so...>  20080111 13:01:25

Bugs item #1869296, was opened at 20080111 07:01 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&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: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: hgfred([1,2],[6],1) bogus Initial Comment: (%i248) hgfred([1,2],[6],1); (%o248) (5*(2/((11)^3*1)+4/((11)^2*1^2)12/((11)*1^3)(24*log(11))/1^424/1^4(24*log(11)*(11))/1^5)*(11)^3)/6 (%i249) ratsimp(%); log(0) has been generated. The correct result is a quotient of products of gamma functions.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1869296&group_id=4933 
From: SourceForge.net <noreply@so...>  20080111 12:55:49

Bugs item #721575, was opened at 20030414 23:45 Message generated for change (Comment added) made by dgildea You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=721575&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  Simplification Group: None Status: Open Resolution: None Priority: 8 Private: No Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: 2/sqrt(2) doesn\'t simplify Initial Comment: 2/sqrt(2) doesn't simplify. Similarly for 2/2^(2/3). On the other hand, x/sqrt(x) => sqrt(x). And of course sqrt(2) simplifies to itself  it doesn't become 2/sqrt(2)!! I believe the original examples should simplify to sqrt(2) and 2^(1/3). Note that 2^(4/3) => 2*2^(1/3) (the current behavior) is probably CORRECT, in order to make things like 10^(10/3) intelligible. Or is there something I'm missing? Maxima 5.9.0 gcl 2.5.0 mingw32 Windows 2000 Athlon  >Comment By: Dan Gildea (dgildea) Date: 20080111 07:55 Message: Logged In: YES user_id=1797506 Originator: NO (%i6) (1/2)*sqrt(2); (%o6) sqrt(2)/2 (%i7) sqrt(2)*(1/2); (%o7) 1/sqrt(2)  Comment By: Stavros Macrakis (macrakis) Date: 20071219 09:59 Message: Logged In: YES user_id=588346 Originator: YES I have raised the priority of this bug, because it is very close to the surface (i.e. easy for just about any user to run into). See also 1853191, where algebraic gives strange results...  Comment By: Stavros Macrakis (macrakis) Date: 20031008 23:21 Message: Logged In: YES user_id=588346 More examples. Righthand side is after ratsimp/algebraic. I believe the general simplifier should be giving those forms. 1/(2*2^(2/3)) 2^(1/3)/4 1/2^(2/3) 2^(1/3)/2 1/(2*SQRT(2)) SQRT(2)/4 1/SQRT(2) SQRT(2)/2 1/(2*2^(1/3)) 2^(2/3)/4 1/2^(1/3) 2^(2/3)/2 Things get worse with nonnumeric contents. In the following, each group of expressions denotes the same thing, but none simplifies to the others. I have put *** next to those forms which are the results of ratsimp/algebraic. Note that in several cases, there is more than one equivalent ratsimp'ed form.... 1/(a*b)^(5/2) 1/(a^2*b^2*SQRT(a*b)) *** SQRT(a*b)/(a^3*b^3) *** 1/(a*b)^(3/2) 1/(a*b*SQRT(a*b)) *** SQRT(a*b)/(a^2*b^2) *** 1/(a*b)^(7/6) 1/(a^(2/3)*b^(2/3)*SQRT(a*b)) *** SQRT(a*b)/(a^(5/3)*b^(5/3)) *** (a*b)^(5/6)/(a^2*b^2) *** 1/(a*b)^(5/6) *** 1/(a^(1/3)*b^(1/3)*SQRT(a*b)) *** (a*b)^(1/6)/(a*b) *** SQRT(a*b)/(a^(4/3)*b^(4/3)) *** 1/SQRT(a*b) *** SQRT(a*b)/(a*b) *** a^(1/3)*b^(1/3)/SQRT(a*b) *** 1/(a*b)^(1/6) *** SQRT(a*b)/(a^(2/3)*b^(2/3)) *** (a*b)^(5/6)/(a*b) *** Now it is true that these expressions are in fact not all equivalent as to principal value, but I will leave that exercise for later. Many of them are, and they are not being canonicalized.  Comment By: Stavros Macrakis (macrakis) Date: 20030417 14:53 Message: Logged In: YES user_id=588346 Yes, of course there are ways within Maxima to perform this simplification. But it should be the default in the general simplifer. The logic already appears to be in the general simplifier, but there is a bug in this particular case. If the general simplifier's philosophy were to leave such things untouched, why does it simplify x/sqrt(x) and the like?  Comment By: Barton Willis (willisb) Date: 20030417 14:44 Message: Logged In: YES user_id=570592 Try ratsimp with algebraic : true (C1) z : 2/sqrt(2); (D1) 2/SQRT(2) (C2) ratsimp(z); (D2) 2/SQRT(2) (C3) ratsimp(z),algebraic; (D3) SQRT(2) (C4) z : 2/2^(2/3); (D4) 2/2^(2/3) (C5) ratsimp(z); (D5) 2/2^(2/3) (C6) ratsimp(z),algebraic; (D6) 2^(1/3) (C7)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=721575&group_id=4933 