Partial fractions in complex analysis: Difference between revisions

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Calculation: Added a tip-off that the condition in the last sentence would be coming
 
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* <math>\Gamma_k</math> lies inside <math>\Gamma_{k+1}</math> for all <math>k</math>
* <math>\lim_{k\rightarrow \infty} d(\Gamma_k) = \infty</math>, where <math>d(\Gamma_k)</math> gives the distance from the curve to the origin
* one more condition of compatibility with the poles <math>\lambda_k</math>, described at the end of this section
 
Suppose also that there exists an integer <math>p</math> such that
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:<math>\sum_{j=0}^p c_{j,k}z^j = [\operatorname{Res}_{z=\lambda_k} f(z)] \sum_{j=0}^p \frac{1}{\lambda_k^{j+1}} z^j</math>
 
* To avoid issues with convergence, the poles should be ordered so that if <math>\lambda_k</math> is inside <math>\Gamma_n</math>, then <math>\lambda_j</math> is also inside <math>\Gamma_n</math> for all <math>j < k</math>.
 
==Example==