Equations

In algebra, a cubic function is a function of the form where a is nonzero.

In fluid mechanics, Kelvin's circulation theorem (named after William Thomson, 1st Baron Kelvin who published it in 1869) states In a barotropic ideal fluid with conservative body forces, the circulation around a closed curve (which encloses the same fluid elements) moving with the fluid remains constant with time.

In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun.

In mathematics, the Maurer–Cartan form for a Lie group G is a distinguished differential one-form on G that carries the basic infinitesimal information about the structure of G.

In mathematics, the Pythagorean theorem, also known as Pythagoras's theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle.

The Black–Scholes /ˌblæk ˈʃoʊlz/ or Black–Scholes–Merton model is a mathematical model of a financial market containing derivative investment instruments.

The equation of time describes the discrepancy between two kinds of solar time.

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

The Lorentz factor or Lorentz term is the factor by which time, length, and relativistic mass change for an object while that object is moving.

In mathematics, a system of linear equations (or linear system) is a collection of two or more linear equations involving the same set of variables.

A Bellman equation, named after its discoverer, Richard Bellman, also known as a dynamic programming equation, is a necessary condition for optimality associated with the mathematical optimization method known as dynamic programming.

In mathematics, to solve an equation is to find what values (numbers, functions, sets, etc.) fulfill a condition stated in the form of an equation (two expressions related by equality).

Friis formula or Friis's formula (sometimes Friis' formula), named after Danish-American electrical engineer Harald T.

I = PAT is the lettering of a formula put forward to describe the impact of human activity on the environment.

Cauchy's equation is an empirical relationship between the refractive index and wavelength of light for a particular transparent material.

In algebra, the theory of equations is the analysis of the nature and algebraic solutions of algebraic equations (also called polynomial equations), which are equations defined by a polynomial.

An algebraic solution or solution in radicals is a closed form expression, and more specifically a closed-form algebraic expression, that is the solution of an algebraic equation in terms of the coefficients, relying only on addition, subtraction, multiplication, division, raising to integer powers, and the extraction of nth roots (square roots, cube roots, and other integer roots).

In algebra, an octic equation is an equation of the form where a ≠ 0.