Sigma Function

In mathematics, by sigma function one can mean one of the following:

  • The sum-of-divisors function σa(n), an arithmetic function
  • Weierstrass sigma function, related to elliptic functions
  • Kronecker's sigma function
  • Rado's sigma function, see busy beaver

See also sigmoid function.

Famous quotes containing the word function:

    “We are thus able to distinguish thinking as the function which is to a large extent linguistic.”
    —Benjamin Lee Whorf (1897–1934)