# singularity and residue

by pivoxa15
Tags: residue, singularity
 P: 2,268 1. The problem statement, all variables and given/known data Do residues exist only for holomorphic function? Classify the singularity and calculate the residue of tanh(z) and tan(z) 3. The attempt at a solution For both Essential isolated singularity because the numerator has an infinite number of terms. Residue = 0.
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