Similar to ベル多項式

Ackermann function

Abel–Ruffini theorem

Alexander polynomial

Small set (combinatorics)

Sumset

Umbral calculus

Pentagonal number theorem

Catalan's constant

Q-analog

Kneser's theorem (combinatorics)

Sicherman dice

Quasi-polynomial

Singmaster's conjecture

Stirling number

Generating function

Annales de Gergonne

P-adic Teichmüller theory

RSA (cryptosystem)

Witch of Agnesi

Abelian group

Category of abelian groups

Abelian category

Abelian variety

Abel's theorem

Abel equation

Abel–Jacobi map