Multiplicative Group of Reduced Residues/Examples/Modulo 5

Definition
Consider the reduced residue system $\Z'_5$ modulo $5$ under modulo multiplication:
 * $\Z'_5 = \set {\eqclass 1 5, \eqclass 2 5, \eqclass 3 5, \eqclass 4 5}$

$\struct {\Z'_5, \times_5}$ is the multiplicative group of reduced residues modulo 5.

Also see

 * Reduced Residues Modulo 5 under Multiplication form Group