Similar to Δ-システム補題

List of alternative set theories

Non-well-founded set theory

List of statements independent of ZFC

Ω-logic

Aronszajn tree

Generic filter

Teichmüller–Tukey lemma

Fodor's lemma

Polyhedral compound

Mostowski collapse lemma

Rasiowa–Sikorski lemma

Grundzüge der Mengenlehre

Five lemma

Nine lemma

Artin–Rees lemma

Shadowing lemma

Sums of three cubes

Institut des Hautes Études Scientifiques

P-adic Teichmüller theory

Iverson bracket

Apollonian sphere packing

American Mathematical Society

Mathematics in the medieval Islamic world

List of things named after Alexander Grothendieck

Q-analog