2016-09-19 15:25:30 -0500 received badge ● Famous Question (source) 2014-06-24 00:58:09 -0500 received badge ● Notable Question (source) 2014-01-22 04:17:56 -0500 received badge ● Student (source) 2013-06-04 23:17:57 -0500 received badge ● Popular Question (source) 2012-07-24 00:20:39 -0500 marked best answer calculating residue with maxima_methods 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))  2012-07-24 00:20:39 -0500 received badge ● Scholar (source) 2012-07-24 00:18:18 -0500 commented answer calculating residue with maxima_methods I was reexamining my old code and found the culprit. When it worked before I had run "assume(x<1/8)". That makes maxima give the same answer as sympy. Sorry for the trouble, but at least I learned something about sympy. 2012-07-07 01:34:55 -0500 asked a question calculating residue with maxima_methods The following used to work around six months ago on sagenb.org: var('x') var('t') ( x/((4*x - 1)*(t^2 - t + x)) ).maxima_methods().residue(t,(1-sqrt(1-4*x))/2)  but now it returns zero which is incorrect. Can anybody help me get the correct answer again?