4The calculus of residues

IB Complex Methods



4 The calculus of residues
Nowadays, we use “calculus” to mean differentiation and integration. However,
historically, the word “calculus” just means doing calculations. The word “calcu-
lus” in the calculus of residues does not refer to differentiation and integration,
even though in this case they are related, but this is just a coincidence.

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