We are hoping to upgrade the version of Maxima in Sage to 5.20, to
take advantage of a number of recent improvements (particularly in
solving). I am finding the following possible regression from 5.19.1
to 5.20.0 (also in 5.20.1):
5.19.1
(%i1) integrate(x*cos(-y*x),x,minf,inf);
(%o1) 0
5.20.0
(%i1) integrate(x*cos(-y*x),x,minf,inf);
(%o1) <ascii art indicating the integral is returned as a nounform>
This is with SBCL and ECL; I've logged it at
http://sourceforge.net/tracker/?func=detail&aid=2919396&group_id=4933&atid=104933
If there is an obvious easy patch for this, we can apply it ourselves
for now and still put 5.20.1 in soon, which we would like to. Thanks
for any assistance you can provide so close to the holidays!