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From: SourceForge.net <noreply@so...>  20070116 18:36:50

Bugs item #1636971, was opened at 20070116 12:42 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636971&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  Differential eqns Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: ?? Initial Comment: Maxima version: 5.9.3.99rc3Maxima build date: 12:37 9/3/2006host type: i686pcmingw32lispimplementationtype: GNU Common Lisp (GCL)lispimplementationversion: GCL 2.6.7 I wanted to know differential from ((x+k*sqrt(1x^2))^(k*asin(x))); I've written: diff((x+k*sqrt(1x^2))^(k*asin(x))); I 've seen: (k*sqrt(1x^2)+x)^(k*asin(x))*((k*log(k*sqrt(1x^2)+x))/sqrt(1x^2)+(k*(1(k*x)/sqrt(1x^2))*asin(x))/(k*sqrt(1x^2)+x))*del(x)+(k*sqrt(1x^2)+x)^(k*asin(x))*(asin(x)*log(k*sqrt(1x^2)+x)+(k*sqrt(1x^2)*asin(x))/(k*sqrt(1x^2)+x))*del(k) After simplify: (((2*k^2*x^32*k^2*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*log(k*sqrt(1x^2)+x)+((kk^3)*x^3+(k^3k)*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(x)+(((1k^2)*x^4+(2*k^21)*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x)*log(k*sqrt(1x^2)+x)+(k^2*x^4+2*k^2*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(k)+sqrt(1x^2)*((((k^3k)*x^2k^3)*(k*sqrt(1x^2)+x)^(k*asin(x))*log(k*sqrt(1x^2)+x)+(2*k^2*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(x)+((2*k*x^32*k*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x)*log(k*sqrt(1x^2)+x)+(k*x^3k*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(k)))/((1k^2)*x^4+sqrt(1x^2)*(2*k*x^32*k*x)+(2*k^21)*x^2k^2) But: diff((x+k*sqrt(1x^2))^(k*asin(x))) = (1+k^2)*%e^(k*asin(x))  >Comment By: Raymond Toy (rtoy) Date: 20070116 13:36 Message: Logged In: YES user_id=28849 Originator: NO What do you want diff to do? I don't understand how you got your expected answer.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636971&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 18:26:51

Bugs item #1631930, was opened at 20070109 20:42 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1631930&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: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(t^(1.2),t); Initial Comment: integrate(t^(1.2),t); gives 5.000000000000001   0.2 t must be 5   0.2 t  >Comment By: Raymond Toy (rtoy) Date: 20070116 13:26 Message: Logged In: YES user_id=28849 Originator: NO I ran this again, and I actually get warnings about converting a float to a rational. I think this is acceptable. I think it would be better if it didn't do this conversion, though.  Comment By: Raymond Toy (rtoy) Date: 20070110 12:46 Message: Logged In: YES user_id=28849 Originator: NO Good point. I would consider this a bug in the definite integration routines. At the very least, it should warn about converting a float to a rational.  Comment By: Nobody/Anonymous (nobody) Date: 20070110 01:31 Message: Logged In: NO But integrate(t^(1.2),t,t1,t2); ("positive" for all questions) gives true 5 5    1/5 1/5 t1 t2 This is a bug or feature?  Comment By: Raymond Toy (rtoy) Date: 20070109 21:09 Message: Logged In: YES user_id=28849 Originator: NO No. Compare with 1/(1.2+1) > 5.000000000000001 If you wanted the exact number 6/5, you should have said so instead of using the floating point number 1.2. Setting status to pending.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1631930&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 17:43:03

Bugs item #1636971, was opened at 20070116 09:42 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=1636971&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  Differential eqns Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: ?? Initial Comment: Maxima version: 5.9.3.99rc3Maxima build date: 12:37 9/3/2006host type: i686pcmingw32lispimplementationtype: GNU Common Lisp (GCL)lispimplementationversion: GCL 2.6.7 I wanted to know differential from ((x+k*sqrt(1x^2))^(k*asin(x))); I've written: diff((x+k*sqrt(1x^2))^(k*asin(x))); I 've seen: (k*sqrt(1x^2)+x)^(k*asin(x))*((k*log(k*sqrt(1x^2)+x))/sqrt(1x^2)+(k*(1(k*x)/sqrt(1x^2))*asin(x))/(k*sqrt(1x^2)+x))*del(x)+(k*sqrt(1x^2)+x)^(k*asin(x))*(asin(x)*log(k*sqrt(1x^2)+x)+(k*sqrt(1x^2)*asin(x))/(k*sqrt(1x^2)+x))*del(k) After simplify: (((2*k^2*x^32*k^2*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*log(k*sqrt(1x^2)+x)+((kk^3)*x^3+(k^3k)*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(x)+(((1k^2)*x^4+(2*k^21)*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x)*log(k*sqrt(1x^2)+x)+(k^2*x^4+2*k^2*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(k)+sqrt(1x^2)*((((k^3k)*x^2k^3)*(k*sqrt(1x^2)+x)^(k*asin(x))*log(k*sqrt(1x^2)+x)+(2*k^2*x^2k^2)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(x)+((2*k*x^32*k*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x)*log(k*sqrt(1x^2)+x)+(k*x^3k*x)*(k*sqrt(1x^2)+x)^(k*asin(x))*asin(x))*del(k)))/((1k^2)*x^4+sqrt(1x^2)*(2*k*x^32*k*x)+(2*k^21)*x^2k^2) But: diff((x+k*sqrt(1x^2))^(k*asin(x))) = (1+k^2)*%e^(k*asin(x))  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636971&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 16:31:13

Bugs item #1636926, was opened at 20070116 10:31 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=1636926&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: Tests Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Nobody/Anonymous (nobody) Summary: rtest16 #39 Initial Comment: Test 39 in rtest16 is: /* Bug 593344 */ limit(abs(infinity)); infinity; The correct answer is inf, not infinity. I believe.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636926&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 14:18:12

Bugs item #1636826, was opened at 20070116 08:18 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=1636826&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 Group: None Status: Open Resolution: None Priority: 4 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Barton Willis (willisbl) Summary: max and min of an array Initial Comment: (%i1) f : make_array('any,2); (%o1) #(NIL NIL) (%i2) max(f,1); Maxima encountered a Lisp error: The same for min. Also, sign(f) > lisp error as well as ?csign(f).  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636826&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 14:15:47

Bugs item #1636823, was opened at 20070116 08:15 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=1636823&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  Complex Group: None Status: Open Resolution: None Priority: 4 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Barton Willis (willisbl) Summary: conjugate of an array Initial Comment: (%i1) f : make_array('any,2); (%o1) #(NIL NIL) (%i2) conjugate(%); Maxima encountered a Lisp error  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636823&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 13:31:10

Bugs item #1636789, was opened at 20070116 07:31 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=1636789&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: Barton Willis (willisbl) Summary: conjugate & ratsubst Initial Comment: The simpconjugate function skips the simplification when the simp flag is true. This is a bug: (%i1) conjugate(log(1 + %i*a)); (%o1) conjugate(log(%i*a1)) (%i2) ratsubst(1,a,%); (%o2) conjugate(log(%i1)) < should be log(1%i) (%i3) conjugate(log(%i1)); (%o3) log(%i1)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636789&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 12:51:58

Bugs item #904522, was opened at 20040225 14:30 Message generated for change (Comment added) made by willisbl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=904522&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  Taylor >Group: Includes proposed fix Status: Open Resolution: None Priority: 5 Private: No Submitted By: Stavros Macrakis (macrakis) Assigned to: Nobody/Anonymous (nobody) Summary: taylorinfo fatal err in multivar case Initial Comment: taylorinfo(taylor(x,[x,y],0,1)) fatal error Maxima 5.9.0 gcl 2.5.0 mingw32 W2k Athlon  >Comment By: Barton Willis (willisbl) Date: 20070116 06:51 Message: Logged In: YES user_id=895922 Originator: NO The taylorize scheme (see trigi.lisp) uses $taylorinfo. So this bug needs to be fixed. Reading the source for taylorinfo, it's not so clear what the author intended. The new taylorinfo function should be compatible with taylorize. (%i12) taylorinfo(taylor(x,[x,y],0,1)); (%o12) [[x,y],[0,0],[1,1]] File Added: tay.lisp  Comment By: Barton Willis (willisbl) Date: 20040226 09:12 Message: Logged In: YES user_id=895922 If you fix this bug, also fix (the easy to fix) bug 867310. Barton  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=904522&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 12:39:47

Bugs item #1636746, was opened at 20070116 06:37 Message generated for change (Comment added) made by willisbl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636746&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: Includes proposed fix Status: Open Resolution: None Priority: 4 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Barton Willis (willisbl) Summary: tellsimp and abs Initial Comment: (%i1) tellsimp(abs(a),a)$ (%i2) abs(5*a); (%o2) 5*abs(a) < should be 5 * a A user shouldn't have to resort to trickery: (%i3) expand(%,0); (%o3) 5*a  >Comment By: Barton Willis (willisbl) Date: 20070116 06:39 Message: Logged In: YES user_id=895922 Originator: YES File Added: rtest_abs.mac  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636746&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 12:37:17

Bugs item #1636746, was opened at 20070116 06:37 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=1636746&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: Includes proposed fix Status: Open Resolution: None Priority: 4 Private: No Submitted By: Barton Willis (willisbl) Assigned to: Barton Willis (willisbl) Summary: tellsimp and abs Initial Comment: (%i1) tellsimp(abs(a),a)$ (%i2) abs(5*a); (%o2) 5*abs(a) < should be 5 * a A user shouldn't have to resort to trickery: (%i3) expand(%,0); (%o3) 5*a  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636746&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 00:51:21

Bugs item #1636106, was opened at 20070115 13:17 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636106&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: Kirill Smelkov (kirr) Assigned to: Nobody/Anonymous (nobody) Summary: integrate(%e^(%i*phi) * A + %e^(%i*phi) * A, phi, 0,2*%pi) Initial Comment: integrate(%e^(%i*phi) * A + %e^(%i*phi) * A, phi, 0,2*%pi) unnessecary ask whether A is pos, neg or zero:: kirr@...:~/study/maxima$ maxima q (%i1) f: %e^(%i*phi) * A + %e^(%i*phi) * A; %i phi  %i phi (%o1) %e A + %e A (%i2) integrate(f, phi, 0,2*%pi); Is A positive, negative, or zero? pos; (%o2) 0 (%i3) build_info(); Maxima version: 5.11.0cvs Maxima build date: 19:58 1/12/2007 host type: i686pclinuxgnu lispimplementationtype: GNU Common Lisp (GCL) lispimplementationversion: GCL 2.6.6  >Comment By: Raymond Toy (rtoy) Date: 20070115 19:51 Message: Logged In: YES user_id=28849 Originator: NO FWIW, it asks this question because maxima is looking at limit(2*a*sin(phi), phi, 0, 'plus). I think maxima has already computed the antiderivative and is now substituting the limits of integration (carefully).  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1636106&group_id=4933 
From: SourceForge.net <noreply@so...>  20070116 00:42:46

Bugs item #1635372, was opened at 20070114 16:10 Message generated for change (Comment added) made by rtoy You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1635372&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: Robert Dodier (robert_dodier) Assigned to: Nobody/Anonymous (nobody) Summary: specint returns expression containing internal Lisp variable Initial Comment: assume(p > 0, a > 0, b > 0); sin(a*t)*cosh(b*t^2)*%e^(p*t); radcan(specint(%,t)); => long expression containing failonf24p146test Not sure what's going on here, haven't looked into it.  >Comment By: Raymond Toy (rtoy) Date: 20070115 19:42 Message: Logged In: YES user_id=28849 Originator: NO This means that maxima thought the integrand looked like t^(v1)*exp(t^2/8/a), but it didn't satisfy the requirements that Re(a) > 0 and Re(v) > 0. At this point it doesn't know how to proceed. I have not convinced myself that this Laplace transform exists. Perhaps we could just return the noun form. If we do that, the answer contains specint(%i/4*exp(b*t^2(p+%i)*t),t) + specint(%i/4*exp(b*t^2(p%i*a)*t)) which is equivalent to specint(exp(b*t^2p*t)*sin(a*t),t)/2.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1635372&group_id=4933 