New posts in Variational Calculus

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

Is it possible to prove that planets should be approximately spherical using the calculus of variations?

Derive Schwinger-Dyson equations in Srednicki

Why treat complex scalar field and its complex conjugate as two different fields?

Rigorous underpinnings of infinitesimals in physics

Lagrangian mechanics and time derivative on general coordinates

The derivation of fractional equations

Minimum energy path of a potential energy surface

Lagrangian to Hamiltonian

Geodesics on a torus