Delta function (disambiguation)

A delta function or Dirac delta function (δ) is a generalized function on the real number line denoted by δ that is zero everywhere except at zero, with an integral of one over the entire real line.

Delta function may also refer to:

• Kronecker delta, a function of two variables which is one for equal arguments and zero otherwise, and which forms the identity element of an incidence algebra
• Modular discriminant (Δ), a complex function in Weierstrass's elliptic functions

See also

• Delta function potential, in quantum mechanics, a potential well described by the Dirac delta function
• Delta-functor
• Delta operator