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Solved Problems in Classical ElectromagnetismAnalytical and Numerical Solutions with Comments$
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J. Pierrus

Print publication date: 2018

Print ISBN-13: 9780198821915

Published to Oxford Scholarship Online: October 2018

DOI: 10.1093/oso/9780198821915.001.0001

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Some essential mathematics

Some essential mathematics

Chapter:
(p.1) 1 Some essential mathematics
Source:
Solved Problems in Classical Electromagnetism
Author(s):

J. Pierrus

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198821915.003.0001

This chapter introduces most of the important mathematics that will be used repeatedly throughout this book. Whilst scalars like the electric potential Ф and the vector fields E and B are familiar quantities in electricity and magnetism, it is not always known that they are examples of a mathematical form termed a tensor. More sophisticated tensors are required in some descriptions and theories in electrodynamics. As tensor notation is compact and usually allows for a simple derivation of a result, the chapter begins with a series of questions involving Cartesian tensors. The results obtained here will facilitate the solution of many questions in subsequent chapters. Readers who are not familiar with tensors are advised to consult Appendix A before proceeding. Towards the end of this Appendix a ‘checklist for detecting errors when using tensor notation’ is given, which will hopefully provide some help for the uninitiated.

Keywords:   vector algebra vector calculus, vector identities Cartesian tensors, Gauss’s theorem Stokes’s theorem, separation of variables Dirac delta function, solid angle time averaging

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