A concise introduction to Colombeau generalized functions and their applications in classical electrodynamics
Abstract
The objective of this introduction to Colombeau algebras of generalized-functions (in which distributions can be freely multiplied) is to explain in elementary terms the essential concepts necessary for their application to basic non-linear problems in classical physics. Examples are given in hydrodynamics and electrodynamics. The problem of the self-energy of a point electric charge is worked out in detail: The Coulomb potential and field are defined as Colombeau generalized-functions, and integrals of nonlinear expressions corresponding to products of distributions (such as the square of the Coulomb field and the square of the delta-function) are calculated. Finally, the methods introduced in Eur. J. Phys. /28/ (2007) 267-275, 1021-1042, and 1241, to deal with point-like singularities in classical electrodynamics are confirmed.
Cite
@article{arxiv.math-ph/0611069,
title = {A concise introduction to Colombeau generalized functions and their applications in classical electrodynamics},
author = {Andre Gsponer},
journal= {arXiv preprint arXiv:math-ph/0611069},
year = {2008}
}
Comments
19 pages. Accepted for publication