Similar to 開写像と閉写像

Symmetrically continuous function

Intermediate value theorem

Brouwer fixed-point theorem

Peano curve

Borsuk–Ulam theorem

Minkowski's question-mark function

Lefschetz fixed-point theorem

Lemma (mathematics)

Artin–Rees lemma

Itô's lemma

Oka's lemma

Ogden's lemma

Osgood's lemma

Gauss's lemma (number theory)

Shadowing lemma

Kronecker's lemma

Kőnig's lemma

Zig-zag lemma

Schur's lemma

Schwarz lemma

Pumping lemma for regular languages

Diagonal lemma

Zorn's lemma

Teichmüller–Tukey lemma

Nakayama's lemma

Neyman–Pearson lemma

Burnside's lemma

Pumping lemma