# Riemann-Lebesgue lemma

> English word · Noun

## Definitions
1. A lemma, of importance in harmonic analysis and asymptotic analysis, stating that the Fourier transform or Laplace transform of an L1 function vanishes at infinity.

## Etymology
Named after German mathematician Bernhard Riemann and French mathematician Henri Lebesgue.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/riemann-lebesgue-lemma