Similar to 5項補題

Helly's theorem

Poincaré–Bendixson theorem

Power of a point

Menelaus's theorem

Monge's theorem

Jacobi's formula

Dominated convergence theorem

Laplace expansion

Law of cosines

Law of cotangents

Routh's theorem

Lucas's theorem

Lexell's theorem

Taylor circle

L'Hôpital's rule

Rolle's theorem

Wiles's proof of Fermat's Last Theorem

Lemma (mathematics)

Artin–Rees lemma

Itô's lemma

Oka's lemma

Ogden's lemma

Osgood's lemma

Open and closed maps

Shadowing lemma

Kronecker's lemma

Schur's lemma

Schwarz lemma