# Lambert series

> English word · Noun

## Definitions
1. A series taking the form S(q)=∑ₙ₌₁ ᪲a_n(qⁿ)/(1-qⁿ).

## Etymology
Named for Johann Heinrich Lambert.

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