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61 views

Compute the contour integral $\int_\gamma\frac{\sin z}{z^4}dz$

Im getting really confused looking at past exam style questions evaluating contour integrals... Can anyone help me in the right direction to solve these.. (i) $\displaystyle\int_\gamma \frac{\sin ...
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0answers
101 views

Prove that if $A$ is null and $f: \mathbb{R} \longrightarrow \mathbb{R}$ has a continuous derivative, then $f(A)$ is null

Prove that if $A$ is null and $f: \mathbb{R} \longrightarrow \mathbb{R}$ has a continuous derivative, then $f(A)$ is null. I think it has something to do with the fact that $f'$ is bounded in any ...
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775 views

Complex Analysis: Laurent Expansion for $\frac{1}{\sin(z)}$ on different annuli.

I've been working through Hilary Priestley's Book Complex Analysis (fantastic read) and have reached her discussion of the Laurent Expansion for holomorphic functions. Considering the function ...