Similar to 共和分

One-form (differential geometry)

Partition of unity

Two-form

Twelfth root of two

Natural logarithm of 2

Sums of three cubes

Ages of Three Children puzzle

68–95–99.7 rule

6-j symbol

A* search algorithm

AB5 category

ABC@Home

Abc conjecture

Acta Mathematica

AKS primality test

AMS-LaTeX

Analyse des Infiniment Petits pour l'Intelligence des Lignes Courbes

Annales de Gergonne

Annali di Matematica Pura ed Applicata

Annals of Mathematics

Arg max

Arthur–Merlin protocol

A¹ homotopy theory

A∞-operad