The superdiagonal of a square matrix is the set of elements directly above the elements comprising the diagonal. For example, in the following matrix, the diagonal elements are denoted and the superdiagonal elements are denoted ,
Superdiagonal
See also
Diagonal, Subdiagonal, Tridiagonal MatrixExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Superdiagonal." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Superdiagonal.html