A First Course in Complex Analysis: Residues
Willms, Allan R.
2022-01-01 00:00:00
[Suppose f(z) has an isolated singularity at z0. Then it has a Laurent series expansion around z0, that converges on the region 0 < |z — z0|< R, for some constant R > 0:
(7.1)\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\matrix{
{f\left( z \right) = \sum\limits_{n \in Z} {{a_n}{{\left( {z - {z_0}} \right)}^n},} }{{\rm{where}}}{{a_n} = {1 \over {2\pi i}}\oint_C {{{f\left( z \right)} \over {{{\left( {z - {z_0}} \right)}^{n + 1}}}}dz,} } \cr
} $$\end{document}]
http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.pnghttp://www.deepdyve.com/lp/springer-journals/a-first-course-in-complex-analysis-residues-mtvYMczRoP
[Suppose f(z) has an isolated singularity at z0. Then it has a Laurent series expansion around z0, that converges on the region 0 < |z — z0|< R, for some constant R > 0:
(7.1)\documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$\matrix{
{f\left( z \right) = \sum\limits_{n \in Z} {{a_n}{{\left( {z - {z_0}} \right)}^n},} }{{\rm{where}}}{{a_n} = {1 \over {2\pi i}}\oint_C {{{f\left( z \right)} \over {{{\left( {z - {z_0}} \right)}^{n + 1}}}}dz,} } \cr
} $$\end{document}]
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