Jump to content

Dirichlet function

From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by Maximus Rex (talk | contribs) at 03:03, 2 May 2004. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

In mathematics, Dirichlet function is defined by D (x) = 0 if x is rational and 1 if x is irrational. The function is named after Johann Peter Gustav Lejeune Dirichlet, a German mathematician.

It turns out, the function is discontinuous everywhere.