(Almost) Theorem

(block) gerschgorin theorem

(Leggett-Williams) fixed point theorem

Ⅱ theorem

3-D potential theorem

3G theorem

3σ theorem

4-color theorem

a fixed-point theorem in double cones

a theorem of alternative

Abel ergodic theorem

abel theorem

abelian theorem

Able’s theorem

a-Browder’s theorem

abstract compactness theorem

acoustical reciprocal theorem

acoustical reciprocity theorem

acyclic model theorem

addition theorem