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Navier-Stokes equation
(physics) A partial differential equation which describes the conservation of linear momentum for a Newtonian incompressible fluid.
Schrödinger's wave equation
(physics) A three-dimensional partial differential equation which determines the evolution of a quantum mechanical wave function
ordinary differential equation
(calculus) An equation involving the derivatives of a function of only one independent variable.
Legendre's differential equation
(mathematics) The equation that defines the Legendre polynomials: d/dx[(1-x²)d/dxP_n(x)]+n(n+1)P_n(x)=0.
Wheeler-DeWitt equation
(physics) An equation that attempts to meld the ideas of quantum mechanics and general relativity. It describes the quantum version of the Hamiltonian constraint using metric variables.
Einstein field equation
(relativity) A symmetric 4 × 4 tensor equation in general relativity in which the gravitational force is described as a curvature of spacetime caused by matter and energy.