List of mathematical identities
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)
- Brahmagupta–Fibonacci two-square 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
- Parseval's identity
- Pfister's sixteen-square identity
- Sun's curious identity
- Vandermonde's identity
Identities for classes of functions
- Logarithmic identities
- Trigonometric identities
- Hypergeometric function identities
- Summation identities