# Lambert W function

> English word · Noun

## Definitions
1. A multivalued function, namely the branches of the converse relation of the function f(w) = weʷ, where w is any complex number and eʷ is the exponential function.

## Etymology
Named after Johann Lambert, who considered a related problem in 1758.

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