Noether's theorem (1918) states that any differentiable symmetry of the action of a physical system has a corresponding conservation law. Noether's theorem has become a fundamental tool of modern theoretical physics and the calculus of variations. A generalisation of the seminal formulations on constants of motion in Lagrangian and Hamiltonian mechanics (1788 and 1833, respectively), it does not apply to systems that cannot be modeled with a Lagrangian; for example, dissipative systems with continuous symmetries need not have a corresponding conservation law. COUNT 3
QSN1 When was Noether's theorem created? ANS1 1918 QSN2 What states that any differentiable symmetry of the action of a physical system has a corresponding conservation law? ANS2 Noether's theorem QSN3 What has become a fundamental tool of modern theoretical physics and the calculus of variations? ANS3 Noether's theorem