Complex analysis formula for an integral

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SUMMARY

The discussion focuses on deriving a formula for the integral \(\int \frac{1}{(z-a)^m(z-b)^n} dz\) within a ball of radius R centered at \(z_0\), where \(|a| < R < |b|\) and \(m, n \in \mathbb{N}\). Participants suggest utilizing the Cauchy integral formula and exploring the method of partial fractions to simplify the integral. The approach of considering poles and residues is also recommended as a viable strategy to solve the integral effectively.

PREREQUISITES
  • Understanding of complex analysis, specifically contour integration.
  • Familiarity with the Cauchy integral formula.
  • Knowledge of partial fraction decomposition techniques.
  • Concepts of poles and residues in complex functions.
NEXT STEPS
  • Study the Cauchy integral formula in detail to understand its applications.
  • Learn about residue theorem and how to apply it for evaluating integrals.
  • Explore advanced techniques in partial fraction decomposition for complex functions.
  • Investigate examples of integrals involving multiple poles and their solutions.
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Students and professionals in mathematics, particularly those specializing in complex analysis, as well as anyone looking to deepen their understanding of integral calculus in the complex plane.

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Homework Statement



Find a formula for:

\int1/(z-a)<sup>m</sup>(z-b)<sup>n</sup>dz

around a ball of radius R, centred at z0

where |a| < R < |b| and m,n\inN.


Homework Equations



Not sure which equations to use, a cauchy integral formula maybe...?

The Attempt at a Solution



I've attempted to split the fraction up into partial fractions, so that the integral is now:

\int1/(z-a)<sup>m</sup>(b-a)<sup>n</sup>+1/(z-b)<sup>n</sup>(b-a)<sup>m</sup>dz

but I don't think this has made it any easier to solve...

any suggestions?
 
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so do you mean
\int \frac{1}{(z-a)^m(z-b)^n} dz

how about considering poles & residues?
 

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