Mazur's theorem may refer to:
Ascoli–Mazur theorem, or Mazur's theorem, a corollary of the Hahn–Banach separation theorem in functional analysis Mazur's torsion theorem, a proof of the torsion conjecture for elliptic curves over the rationals Mazur's control theorem, in number theory
See also Mazur's Conjecture B, a weaker variant of the uniform boundedness conjecture Mazur's lemma, a result in the theory of normed vector spaces