Recent changes to 2441: error in residue calculation?http://sourceforge.net/p/maxima/bugs/2441/Recent changes to 2441: error in residue calculation?enSun, 08 Jul 2012 02:22:25 -0000error in residue calculation?http://sourceforge.net/p/maxima/bugs/2441/Maxima 5.27.0 http://maxima.sourceforge.net
using Lisp SBCL 1.0.24
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.
\(%i1\) residue\(\( x/\(\(4\*x - 1\)\*\(t^2 - t + x\)\) \),t,\(1-sqrt\(1-4\*x\)\)/2\);
\(%o1\) 0
But apparently this should give a result in x?
sage: from sympy import Symbol, residue
sage: x = Symbol\("x"\)
sage: t = Symbol\("t"\)
sage: residue\(x/\(\(4\*x - 1\)\*\(t^2 - t + x\)\),t,\(1-sqrt\(1-4\*x\)\)/2\)
-x/\(\(-4\*x + 1\)\*\*\(1/2\)\*\(4\*x - 1\)\)
This was first reported at http://ask.sagemath.org/question/1588/calculating-residue-with-maxima\_methods
I make no claim for the mathematical correctness - just reporting quickly - but since the function has t in the denominator, that it would be nonzero seems reasonable.AnonymousSun, 08 Jul 2012 02:22:25 -0000http://sourceforge.neta090ebd28470bfa0a9238236ec3693e670977436