In Combustion, G equation is a scalar G ( x , t ) {\displaystyle G(\mathbf {x} ,t)} field equation which describes the instantaneous flame position, introduced...

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

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

wave equation, the diffusion equation, and the Schrödinger equation for a free particle. In optics, the Helmholtz equation is the wave equation for the...

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

Navier–Stokes are a parabolic equation and therefore have better analytic properties, at the expense of having less mathematical structure (e.g. they are never completely...

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

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

In fluid dynamics, the Darcy–Weisbach equation is an empirical equation that relates the head loss, or pressure loss, due to friction along a given length...

Poisson's equation is an elliptic partial differential equation of broad utility in theoretical physics. For example, the solution to Poisson's equation is the...

In mathematics and physics, Laplace's equation is a second-order partial differential equation named after Pierre-Simon Laplace, who first studied its...

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...

A differential equation can be homogeneous in either of two respects. A first order differential equation is said to be homogeneous if it may be written...

The classical rocket equation, or ideal rocket equation is a mathematical equation that describes the motion of vehicles that follow the basic principle...

functional equation) g ( x + y ) + g ( x − y ) = 2 [ g ( x ) g ( y ) ] {\displaystyle g(x+y)+g(x-y)=2[g(x)g(y)]\,\!} (d'Alembert's functional equation) f (...

Klein–Gordon equation (Klein–Fock–Gordon equation or sometimes Klein–Gordon–Fock equation) is a relativistic wave equation, related to the Schrödinger equation. It...

A continuity equation or transport equation is an equation that describes the transport of some quantity. It is particularly simple and powerful when...

comparametric equation, when we define g(t) = ƒ(2t), so that we have g = 4ƒ no longer contains the parameter, t. The comparametric equation g = 4ƒ has a...

convection–diffusion equation is a parabolic partial differential equation that combines the diffusion and convection (advection) equations. It describes physical...

In electrochemistry, the Nernst equation is a chemical thermodynamical relationship that permits the calculation of the reduction potential of a reaction...

other equation to obtain an equation involving x and y only: Solving y = g ( t ) {\displaystyle y=g(t)} to obtain t = g − 1 ( y ) {\displaystyle t=g^{-1}(y)}...

The van der Waals equation, named for its originator, the Dutch physicist Johannes Diderik van der Waals, is an equation of state that extends the ideal...

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas. The reactant entities are given...

an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign =. The word equation and...

integral equations are equations in which an unknown function appears under an integral sign. In mathematical notation, integral equations may thus be...

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

physical chemistry, the Arrhenius equation is a formula for the temperature dependence of reaction rates. The equation was proposed by Svante Arrhenius...

factor H/T2. Similar equations include The typical applications of this equation are to chemical reactions. The equation reads: ( ∂ ( Δ G ⊖ / T ) ∂ T ) p =...

dynamics, the Hagen–Poiseuille equation, also known as the Hagen–Poiseuille law, Poiseuille law or Poiseuille equation, is a physical law that gives the...

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