Cauchy Integral Formula and Electrodynamics

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SUMMARY

The discussion centers on the application of the Cauchy Integral Formula in solving for the electric field (E field) from a charge density function in electrodynamics. The Cauchy Integral Formula, expressed as the integral of f[z]/(z-z0)^(n+1)dz, is compared to Gauss's theorem, highlighting its potential to simplify the computation of electric fields by treating charge distributions as mathematical singularities. The conversation suggests that while the integral may be complex, the underlying principles of complex analysis could provide valuable insights into two-dimensional electrodynamics problems.

PREREQUISITES
  • Understanding of Cauchy Integral Formula in complex analysis
  • Familiarity with Gauss's theorem in electromagnetism
  • Knowledge of electric field calculations from charge density functions
  • Basic concepts of singularities in mathematical functions
NEXT STEPS
  • Research the application of Cauchy Residue Theorem in electrodynamics
  • Study the implications of complex variables in electromagnetic theory
  • Explore advanced topics in two-dimensional electrostatics
  • Learn about mathematical singularities and their role in physics
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Physicists, electrical engineers, and students of electromagnetism seeking to deepen their understanding of the relationship between complex analysis and electric field calculations.

sinyud
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Is it possible to solve for an E field from a charge density function using the Cauchy Integral Formulas from complex variables?

Cauchy Integral Formula about a closed loop in the complex plane
(Integral[f[z]/ (z-z0)^(n+1)dz = 2 pi i /n! d^n f(z0)/dz ])

that is the n derivative of f with respect to z evaluated at z0
 
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If I remember that was a curl type formula and you need a divergence type formula. It may not require math that complicated. It is just that doing the integral might be awkward. In the formula E=Integral (rho/r^2) dr.
 
I was thinking that just like the Gauss's theorem (the surface integral version of the Div[E] = rho/ epsilon) picks out charges which are in effect mathematical singularities, so to the cauchy residue theorem picks out every 1/z of a function.

Can this similarity be used to solve electrodynamics problems in two dimensions?
 

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