New posts in Variational Principle

What is the actual form of Noether current in field theory?

Derivation of Euler-Lagrange equation from principle of least action

Polyakov From Nambu-Goto Directly, for Strings?

When/why does the principle of least action plus boundary conditions not uniquely specify a path?

What canonical momenta are the "right" ones?

How to calculate the refracted light path when refraction index continuously increasing?

Variation of Action with time coordinate variations

When can we add a total time derivative of $f(q, \dot{q}, t)$ to a Lagrangian?

Derivation of Euler-Lagrange equations for Lagrangian with dependence on second order derivatives

Lagrangian for relativistic massless point particle