Example image of eyePlorer eyePlorer map for 'Action (physics)': Physical system Physics Functional (mathematics) Trajectory International System of Units Time Planck constant Stationary point Equations of motion Principle of least action Path integral formulation Quantum mechanics String theory Lagrangian Gottfried Leibniz Johann Bernoulli Leonhard Euler Light Pierre Louis Maupertuis Differential equation Hamilton's principle Integral equation Classical mechanics Electromagnetism Field (physics) Gravitation Quantum field theory Calculus of variations Time evolution Integral Maupertuis' principle Classical physics Function (mathematics) Scalar (physics) Generalized coordinates Saddle point Lagrangian mechanics Functional Hamilton–Jacobi equation Antiderivative Dependent and independent variables Action-angle coordinates Phase space Adiabatic invariant Euler–Lagrange equation Functional analysis Polar coordinate system Proper time World line Einstein–Hilbert action