languages may have subtly different meanings; for example, in French an équation is defined as containing one or more variables, while in English, any well-formed...

equations, also known as a system of equations or an equation system, is a finite set of equations for which common solutions are sought. An equation...

The Schrödinger equation is a partial differential equation that governs the wave function of a quantum-mechanical system.: 1–2  Its discovery was a significant...

The Navier–Stokes equations (/nævˈjeɪ stoʊks/ nav-YAY STOHKS) are partial differential equations which describe the motion of viscous fluid substances...

In mathematics, a differential equation is an equation that relates one or more unknown functions and their derivatives. In applications, the functions...

consiste dans une certaine relation entre leurs branches, exprimée par une Équation donnée.", Histoire de l'Académie Royale des Sciences: 196–215. Kamke, E...

mathematics and physics, the heat equation is a certain partial differential equation. Solutions of the heat equation are sometimes known as caloric functions...

In mathematics, a partial differential equation (PDE) is an equation which computes a function between various partial derivatives of a multivariable...

In mathematics, a quadratic equation (from Latin quadratus 'square') is an equation that can be rearranged in standard form as a x 2 + b x + c = 0 , {\displaystyle...

The God Equation: The Quest for a Theory of Everything is a popular science book by the futurist and physicist Michio Kaku. The book was initially published...

In mathematics, an algebraic equation or polynomial equation is an equation of the form P = 0 {\displaystyle P=0} , where P is a polynomial with coefficients...

field equations (EFE; also known as Einstein's equations) relate the geometry of spacetime to the distribution of matter within it. The equations were...

Maxwell's equations, or Maxwell–Heaviside equations, are a set of coupled partial differential equations that, together with the Lorentz force law, form...

"The Equation" is the eighth episode of the first season of the American science fiction drama television series Fringe. The episode follows the Fringe...

In mathematics, a Diophantine equation is an equation, typically a polynomial equation in two or more unknowns with integer coefficients, for which only...

the QCD evolution equations for parton densities, obtained with Guido Altarelli, known as the Altarelli–Parisi or DGLAP equations, the exact solution...

costate equation is related to the state equation used in optimal control. It is also referred to as auxiliary, adjoint, influence, or multiplier equation. It...

The Volterra equation may refer to the Volterra integral equation, an integral in the style of Fredholm theory. Product integral, an integral over an operator-valued...

In mathematics, a linear equation is an equation that may be put in the form a 1 x 1 + … + a n x n + b = 0 , {\displaystyle a_{1}x_{1}+\ldots +a_{n}x_{n}+b=0...

A Bellman equation, named after Richard E. Bellman, is a necessary condition for optimality associated with the mathematical optimization method known...

The wave equation is a second-order linear partial differential equation for the description of waves or standing wave fields such as mechanical waves...

équations aux différences partielles linéaires du second ordre," (5 May 1798). "Mémoire sur les séries et sur l'intégration complète d'une équation aux...

In fluid dynamics, the Euler equations are a set of partial differential equations governing adiabatic and inviscid flow. They are named after Leonhard...

In physics and chemistry, an equation of state is a thermodynamic equation relating state variables, which describe the state of matter under a given...

system of equations, which is a set of simultaneous equations in which the unknowns (or the unknown functions in the case of differential equations) appear...

The Roothaan equations are a representation of the Hartree–Fock equation in a non orthonormal basis set which can be of Gaussian-type or Slater-type....

In physics, equations of motion are equations that describe the behavior of a physical system in terms of its motion as a function of time. More specifically...

same equation can be called the advection–diffusion equation, drift–diffusion equation, or (generic) scalar transport equation. The general equation in...

The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy...

In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form, or including...