Basic concept
Distributions - Operations and derivatives

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Basic concept


Distributions - Operations and derivatives

Author : Michel DOISY

Publication date: October 10, 2004 | Lire en français

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1. Basic concept

The concept of a distribution, originally known as a generalized function, is a relatively recent but fundamental concept in physics. This tool, introduced empirically by Dirac at the beginning of the century, was given a rigorous mathematical formulation in the years 1945–1950, largely thanks to the work of Laurent Schwartz. Among distributions, the Dirac delta function, now called the Dirac distribution, plays a key role.

The delta function was introduced as the limit, as ε → 0 + , of functions (or functions of the same type) (Figure 1 ): D()

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