A strictly upper triangular matrix is an upper triangular matrix having 0s along the diagonal as well as the lower portion, i.e., a matrix such that for . Written explicitly,
Strictly Upper Triangular Matrix
See also
Lower Triangular Matrix, Strictly Lower Triangular Matrix, Triangular MatrixExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Strictly Upper Triangular Matrix." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/StrictlyUpperTriangularMatrix.html