Similar to マルコフ＝角谷の不動点定理

Alphabet (formal languages)

Leon Battista Alberti

Almagest

Alexander polynomial

Alexander horned sphere

Alexander's theorem

Menelaus of Alexandria

List of things named after Alexander Grothendieck

Pavel Alexandrov

Alexandroff extension

Alexandrov theorem

Aleph number

Allen–Cahn equation

Nachman Aronszajn

Aronszajn tree

Fixed-point theorem

Kakutani fixed-point theorem

Caristi fixed-point theorem

Kleene fixed-point theorem

Schauder fixed-point theorem

Nielsen theory

Banach fixed-point theorem

Brouwer fixed-point theorem

Poincaré–Birkhoff theorem

Borel fixed-point theorem

Fixed-point theorems in infinite-dimensional spaces

Lefschetz fixed-point theorem