View source for Introduction to Mathematical Physics/N body problem and matter description/Abstract

<math>N</math> body problem is the fundamental problem of the modern description of
Nature. In this chapter we have shown through various examples the
variety of 
matter arrangement one can encounter in Nature.
We have noticed that, in general, among the four fundamental
interactions (strong 
interaction, weak interaction, electromagnetic interaction,
gravitation), gravitational and/or electromagnetic interactions are
relevant for the description of system of super nuclear scales that
are our interest in the rest of the book.
In the next two chapters, we will present the description of
gravitational and electromagnetic interactions.

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