This page lists mathematical identities, that is, identically true relations holding in mathematics.
Bézout's identity (despite of its usual name, it is not, properly speaking, an 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
MacWilliams identity
Matrix determinant lemma
Parseval's identity
Pfister's sixteen-square identity
Sherman–Morrison formula
Sun's curious identity
Vandermonde's identity
Woodbury matrix identity
