--- title: function slug: function qid: Q1168263 snapshot: function-136023-c96797efafd95170 content_hash: c96797efafd95170d35eef4c19d3a8db2761cca894a3b040d04f3cf1da47a0ee license: CC BY-SA 4.0 source: https://en.wikipedia.org/w/index.php?oldid=1085905205 tags: [23118434, 3564997, 3566086, 4410601] --- # function > [!note] Provenance > Snapshot `function-136023-c96797efafd95170` · content root `c96797efafd95170…` > Derived from · Licensed CC BY-SA 4.0 In mathematics, the Ξ function (named for the Greek letter Ξ or Xi) may refer to: * Riemann Xi function, a variant of the Riemann zeta function with a simpler functional equation * Harish-Chandra's Ξ function, a special spherical function on a semisimple Lie group Function or functionality may refer to: