In linear algebra, an idempotent matrix is a Matrix which, when multiplied by itself, yields itself. That is, the matrix \(A\) is idempotent if and only if \(A^2 = A\).
Bibliography
“Idempotent Matrix.” 2022. Wikipedia, May. https://en.wikipedia.org/w/index.php?title=Idempotent_matrix&oldid=1089600534.