List of variational topics

This is a list of variational topics in from mathematics and physics. See calculus of variations for a general introduction.
 * Action (physics)
 * Averaged Lagrangian
 * Brachistochrone curve
 * Calculus of variations
 * Catenoid
 * Cycloid
 * Dirichlet principle
 * Euler–Lagrange equation cf. Action (physics)
 * Fermat's principle
 * Functional (mathematics)
 * Functional derivative
 * Functional integral
 * Geodesic
 * Isoperimetry
 * Lagrangian
 * Lagrangian mechanics
 * Legendre transformation
 * Luke's variational principle
 * Minimal surface
 * Morse theory
 * Noether's theorem
 * Path integral formulation
 * Plateau's problem
 * Prime geodesic
 * Principle of least action
 * Soap bubble
 * Soap film
 * Tautochrone curve