The set of Dirichlet characters $\chi\colon\Z\to\C$ of modulus $q$ form a group isomorphic (though not canonically) to $(\Z/q\Z)^\times$, which has **order** $\varphi(q)$, where $\varphi$ is the Euler function.

**Authors:**

**Knowl status:**

- Review status: reviewed
- Last edited by Alina Bucur on 2018-07-04 21:42:18

**Referred to by:**

**History:**(expand/hide all)

- 2018-07-04 21:42:18 by Alina Bucur (Reviewed)