Hello,
First i have the following problem with both maxima-5.14.0 and
maxima-5.15.0 compiled with a variety of lisps (gcl, cmucl):
(%i1) load (zeilberger);
(%i5) GosperSum (m*(n-m+1)*(n+m-2)/2,m,0,n);
Division by 0
#0: GosperSumVerboseOpt(f=m*(n-m+1)*(n+m-2)/2,k=m,a=0,b=n,mode=0)(Gosper.mac
line 247)
#1: GosperSum(f=m*(n-m+1)*(n+m-2)/2,k=m,a=0,b=n)(Gosper.mac line 253)
-- an error. To debug this try debugmode(true);
But maple gives a nice value for this sum:
factor(expand(sum(m*(n-m+1)*(n+m-2)/2,m=0..n)));
n (n - 1) (n + 2) (n + 1)/8
Second, with both maxima-5.14.0 and maxima-5.15.0, compiled with cmucl
on FreeBSD, plot2d doesn't work (it works when maxima is compiled with gcl).
niobe% maxima
Maxima 5.15.0 http://maxima.sourceforge.net
Using Lisp CMU Common Lisp Snapshot 2008-02 (19E)
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) plot2d (sin(x), [x, -5, 5])$
Maxima encountered a Lisp error:
Arithmetic error DIVISION-BY-ZERO signalled.
Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
I get the same message for any function i try to plot.
--
Michel Talon