Similar to P進タイヒミュラー理論

Einstein notation

Akaike information criterion

Askey–Gasper inequality

Askey scheme

Arzelà–Ascoli theorem

Hadamard matrix

Hadamard transform

Ackermann function

Atiyah–Singer index theorem

Sieve of Atkin

Apéry's constant

Apéry's theorem

Abel–Plana formula

Apollonius point

Apollonian gasket

Archimedes's cattle problem

Archimedean property

Twin circles

Algorithm

Artin L-function

Wedderburn–Artin theorem

Artinian module

Generalized Riemann hypothesis

Witten conjecture

Enneper surface

Calabi–Yau manifold

Riemann–Roch theorem for surfaces

Gröbner basis