List of mathematical identities

This article lists mathematical identities, that is, identically true relations holding in mathematics.


 * Bézout's identity (despite its usual name, it is not, properly speaking, an identity)
 * Binet-cauchy identity
 * Binomial inverse theorem
 * Binomial identity
 * Brahmagupta–Fibonacci two-square identity
 * Candido's identity
 * Cassini and Catalan identities
 * Degen's eight-square identity
 * Difference of two squares
 * Euler's four-square identity
 * Euler's identity
 * Fibonacci's identity see Brahmagupta–Fibonacci identity or Cassini and Catalan identities
 * Heine's identity
 * Hermite's identity
 * Lagrange's identity
 * Lagrange's trigonometric identities
 * List of logarithmic identities
 * MacWilliams identity
 * Matrix determinant lemma
 * Newton's identity
 * Parseval's identity
 * Pfister's sixteen-square identity
 * Sherman–Morrison formula
 * Sophie Germain identity
 * Sun's curious identity
 * Sylvester's determinant identity
 * Vandermonde's identity
 * Woodbury matrix identity

Identities for classes of functions

 * Exterior calculus identities
 * Fibonacci identities: Combinatorial Fibonacci identities and Other Fibonacci identities
 * Hypergeometric function identities
 * List of integrals of logarithmic functions
 * List of topics related to $\pi$
 * List of trigonometric identities
 * Inverse trigonometric functions
 * Logarithmic identities
 * Summation identities
 * Vector calculus identities