My complex analysis is very rusty, so I can't tell if the problem here is
me or Sage:
z = var('z')
f = e^(z/2)
f.residue(z)
Result: 0
x = var('x')
g = e^x
t = g.taylor(x, 0, 5)
t(x = 2/z)
Result: 2/z + 2/z^2 + 4/3/z^3 + 2/3/z^4 + 4/15/z^5 + 1
So the coefficient of 1/z is 2, and the residue should be 2?
Thanks,
Rob
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