Stefán Ingi's profile - activity

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))

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.

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?