Lemma

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Notion

Domain

Science and technology

In collections

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What Wikipedia says

In mathematics and other fields, a lemma (pl.: lemmas or lemmata) is a generally minor proven proposition used to prove a larger statement. For that reason, it is also known as a "helping theorem" or an "auxiliary theorem".

Excerpt from the Wikipedia article “Lemma (mathematics)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia