New posts in Lagrangian Formalism

Compute the Legendre transform for a singular Lagrangian

Particle on a circle with magnetic flux$.$

A mathematically illogical argument in the derivation of Hamilton's equation in Goldstein

History of Principle of Least Action

Why relativistic Lagrangian doesn't simply equal kinetic minus potential energy $L=T-V$?

Confusion with Virtual Displacement

Deriving special relativity free particle Lagrangian using infinitesimal boost?

What does a symmetry that changes the Lagrangian by a total derivative do to the Hamiltonian $H$?

Why do we use the Lagrangian and Hamiltonian instead of other related functions?

What is the physical content of the principle of least action?