Noether's theorem states that every differentiable symmetry of the action of a physical system has a corresponding conservation law.

Noether's theorem may also refer to:

Theorems by Emmy Noether Noether's second theorem, on infinite-dimensional Lie algebras and differential equations Noether normalization lemma, on finitely generated algebras over a field Noether isomorphism theorems in abstract algebra

Theorems by Max Noether Max Noether's theorem, several theorems Noether's theorem on rationality for surfaces Noether inequality, a property of compact minimal complex surfaces that restricts the topological type of the underlying topological 4-manifold

See also Emmy Noether (1882–1935), German Jewish mathematician Herglotz–Noether theorem, in special relativity Lasker–Noether theorem, that states that every Noetherian ring is a Lasker ring Skolem–Noether theorem, which characterizes the automorphisms of simple rings Albert–Brauer–Hasse–Noether theorem, in algebraic number theory Brill–Noether theory, in the theory of algebraic curves