New posts in Lagrangian Formalism

Are Maxwell's equations "physical"?

Hamiltonian for relativistic free particle is zero

Varying the Einstein-Hilbert action without reference to a chart

Why isn't the Euler-Lagrange equation trivial?

One-loop Correction to Effective Action

What are holonomic and non-holonomic constraints?

Derivative of the electromagnetic tensor invariant $F_{\mu\nu}F^{\mu\nu}$

Global $U(1)$ symmetry of 2+1D Abelian-Higgs Model

Why is Noether's theorem important?

Counting massive degrees of freedom after gauge fixing