Duduli

A matrix ‘A’ wil be called a periodic matrix, if,          A^k+1 = A        Where, K is a positive integer        If K is least positive integer then k is period of A If,     K=1 then A²=A which is idempotent matrix.      

A matrix, such that A²=A is called idempotent matrix.     e.g            A²=A So given matrix A is an                         idempotent matrix .