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A bug in residue

Alec Mihailovs 4455
January 15 2009
0

Studying the integral bug discussed in Axel Vogt's blog, I met the following,

residue(arctan(z)^2/(1+z^2),z=I);

                                 1/2      1/2 2
                                2    (z I)
                       1/2 I ln(-------------)
                                      2

Not talking whether the residue has sense in this case, or not, having z in the answer is very wrong.

Alec
integral

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