Pole (Complex Analysis)/Examples/sin z over (z-pi) (z-2)^4
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Examples of Poles in the context of Complex Analysis
Let $f$ be the complex function:
- $\forall z \in \C \setminus \set 2: \map f z = \dfrac {\sin z} {\paren {z - \pi} \paren {z - 2}^4}$
Then $f$ has a pole of order $4$ at $z = 2$
Note that at $z = \pi$ there is no pole as the numerator is $0$ at that point.
Sources
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): pole (in complex analysis)