D2I1A1G2O1N1A1L1I1Z10E1
22 points
DIAGONALIZE is validvalid
to find a similar diagonal matrix to [v DIAGONALIZED, DIAGONALIZES, DIAGONALIZING] : DIAGONALIZATION [n]
to put (a matrix) in a form with all the nonzero elements along the diagonal from upper left to lower right, also DIAGONALISE [v DIAGONALIZED, DIAGONALIZING, DIAGONALIZES]