Reduction formula
# Reduction formula

A reduction formula is used to represent some expression in a simpler form.

It may refer to:

## Mathematics

* Formulas of reduction, the decomposition of multiple integrals
* Integration by reduction formulae, expressing an integral in terms of the same integral but in lower powers

## Physics

* LSZ reduction formula, a method to calculate S-matrix elements from the time-ordered correlation functions of a quantum field theory
