Noether 1918 (extended): every continuous symmetry of action yields conserved current j^μ via ∂_μ j^μ = 0. Translation→energy-momentum; rotation→angular-momentum; gauge→charge. Backbone of all modern physics conservation laws.
Noether 1918 (extended): every continuous symmetry of action yields conserved current j^μ via ∂_μ j^μ = 0. Translation→energy-momentum; rotation→angular-momentum; gauge→charge. Backbone of all modern physics conservation laws.