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From: SourceForge.net <noreply@so...>  20110924 20:26:28

Bugs item #3413648, was opened at 20110924 14:26 Message generated for change (Tracker Item Submitted) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3413648&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: 5 Private: No Submitted By: Robert Dodier (robert_dodier) Assigned to: Nobody/Anonymous (nobody) Summary: nusum: evaluation error ignored => incorrect result Initial Comment: From the mailing list: "unexpected behavior of simplify_sum" On 09/09/2011 01:25 PM, Andrej Vodopivec wrote: This is a bug in nusum. (%i2) nusum(F(d,1,1,1,1,b2,l2), l2, 0, b2); (%o2) 0 Basically, what nusum does is (%i3) load(zeilberger)$ (%i4) ad: AntiDifference(F(d,1,1,1,1,b2,l2), l2)$ (%i5) subst(l2=b2+1, ad)  subst(l2=0, ad)$ factorial: factorial of negative integer 1 not defined.  an error. To debug this try: debugmode(true); The error comes from the upper bound. (%i6) subst(l2=b2+1, ad); factorial: factorial of negative integer 1 not defined.  an error. To debug this try: debugmode(true); My guess is that nusum does not handle this error and just returns the substitution of the lower bound (%i7) subst(l2=0, ad); (%o7) 0 You could disable the nusum computation with use_gosper=false, but then simplify_sum fails to compute the sum: (%i12) simplify_sum(%), use_gosper=false; Is b21 positive, negative, or zero? pos; Is d2 positive, negative, or zero? pos; Is d1 positive, negative, or zero? pos; Is d+b21 positive, negative, or zero? pos; expt: undefined: 0 to a negative exponent. (%o12) sum(((1)^l2*(l2+d1)!*(l2+d+b22)!)/((b2l2)!*l2!*(l2+d2)!*(l2+d+1)!),l2,0,b2) On 08/24/2011 03:57 PM, andre maute wrote: Hi, I have the following test, with a sum depending on b2. For general b2 simplify_sum gives an incorrect value. Andre  testsimplify_sum1.max  display2d : false; F(d,a1,k1,a2,k2,b2,l2) := block( [res:1], res : res/(b2l2)!, res : res/l2!, res : res*(1)^l2, res : res*(b2+l2+d2)!, res : res/(l2+d2)!, res : res*(k2+l2+d2)!, res : res/(k2+l2+d1+k1)!, return(res) ); load("simplify_sum"); s:sum(F(d,1,1,1,1,b2,l2),l2,0,b2); h : simplify_sum(s); h : factor(minfactorial(h)); s:sum(F(d,1,1,1,1,2,l2),l2,0,2); h : simplify_sum(s); h : factor(minfactorial(h));  testsimplify_sum1.max   testsimplify_sum1.txt  Maxima 5.19.2 http://maxima.sourceforge.net Using Lisp SBCL 1.0.401.fc14 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) batch(testsimplify_sum1.max) batching /home/user/progs/testsimplify_sum1.max (%i2) display2d : false (%o2) false (%i3) F(d,a1,k1,a2,k2,b2,l2):=block([res:1],res:res/(b2l2)!,res:res/l2!, res:res*(1)^l2,res:res*(2+d+l2+b2)!,res:res/(2+d+l2)!, res:res*(2+d+l2+k2)!,res:res/(k11+d+l2+k2)!,return(res)) (%o3) F(d,a1,k1,a2,k2,b2,l2):=block([res:1],res:res/(b2l2)!,res:res/l2!, res:res*(1)^l2,res:res*(2+d+l2+b2)!,res:res/(2+d+l2)!, res:res*(2+d+l2+k2)!,res:res/(k11+d+l2+k2)!,return(res)) (%i4) load("simplify_sum") (%o4) "/home/user/opt/maxima/share/maxima/5.19.2/share/contrib/solve_rec/simplify_sum.mac" (%i5) s:sum(F(d,1,1,1,1,b2,l2),l2,0,b2) (%o5) 'sum((1)^l2*(l2+d1)!*(l2+d+b22)!/((b2l2)!*l2!*(l2+d2)!*(l2+d+1)!), l2,0,b2) (%i6) h:simplify_sum(s) (%o6) 0 (%i7) h:factor(minfactorial(h)) (%o7) 0 (%i8) s:sum(F(d,1,1,1,1,2,l2),l2,0,2) (%o8) (d+1)!*(d+2)!/(2*d!*(d+3)!)d!*(d+1)!/((d1)!*(d+2)!) +(d1)!*d!/(2*(d2)!*(d+1)!) (%i9) h:simplify_sum(s) (%o9) (d+1)!*(d+2)!/(2*d!*(d+3)!)d!*(d+1)!/((d1)!*(d+2)!) +(d1)!*d!/(2*(d2)!*(d+1)!) (%i10) h:factor(minfactorial(h)) (%o10) 2/((d+1)*(d+2)*(d+3)) (%o10) "/home/user/progs/testsimplify_sum1.max"  testsimplify_sum1.txt   You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3413648&group_id=4933 
From: SourceForge.net <noreply@so...>  20110924 16:29:56

Bugs item #3397031, was opened at 20110823 14:43 Message generated for change (Comment added) made by robert_dodier You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3397031&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: Wont Fix Priority: 5 Private: No Submitted By: Pablo (pabloms) Assigned to: Nobody/Anonymous (nobody) Summary: ERROR: quad_qags and matrix Initial Comment: The problem is that it isn't possible integrate a matrix with quad_qags function. I have a 4x1 matrix, for example, and I want integrate componet by component with a bucle, but it doesn't work... I used a trap to get my objetive: I used determinant() function to convert the 1x1 vector to a number. ;)  >Comment By: Robert Dodier (robert_dodier) Date: 20110924 10:29 Message: Hi, this problem is not a bug. I think the best way to handle it is by mapping a lambda expression over the matrix, as suggested in a previous comment. I'm closing this report as "won't fix".  Comment By: Barton Willis (willisbl) Date: 20110824 03:56 Message: Another thing: you didn't need to use determinant to extract the 1,1 entry of a 1x1 matrix. Here are two ways: (%i56) m : matrix([42]); (%o56) matrix([42]) (%i57) first(first(m)); (%o57) 42 (%i58) m, scalarmatrixp : 'all; (%o58) 42  Comment By: Barton Willis (willisbl) Date: 20110824 03:40 Message: You can do want you want by mapping a lambda form onto the matrix: (%i37) matrixmap(lambda([s], first(quad_qags(s,x,0,1,'epsrel=1.0d10))), matrix([1,x],[x^2,x^3])); (%o37) matrix([1.0,0.5],[0.333333333333333,0.25]) Correct me if I'm mistaken, but isn't your report a feature request, not a bug?  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3397031&group_id=4933 
From: SourceForge.net <noreply@so...>  20110924 16:23:38

Bugs item #3387024, was opened at 20110805 15:43 Message generated for change (Comment added) made by robert_dodier 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.  >Comment By: Robert Dodier (robert_dodier) Date: 20110924 10:23 Message: Hi, sorry for the late reply. What happens if you try to plot something in command line Maxima? or XMaxima? (Command line Maxima and XMaxima should be installed with wxMaxima.) In command line Maxima or XMaxima, try: plot2d (sin(x), [x, 0, 10]); (There are several kinds of plotting commands, which have different syntax and work differently ... sorry for the confusion.) Maybe you can work around the problem by changing the Maxima variable maxima_tempdir, which is the folder into which plot2d writes its temporary files. (Sorry, I don't know if wxplot also uses maxima_tempdir.)  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=3387024&group_id=4933 