A matrix A is called idempotent if A2=A. I am just wondering if such matrix can be complex. Anyone can help give an example or proof that it ... ... <看更多>

引述《maiden017 (新八是眼鏡架!)》之銘言： : 請問idempotent matrix 一定會是symmetric嗎? : 能夠證明嗎?<(_ _)>.. idempotent只是說A^2=A 1 1 1 1 ... ... <看更多>

is.idempotent.matrix <- function( x, tol=1e-8 ). {. ###. ### This function returns TRUE if the argument matrix is idempotent,. ... <看更多>