The subdiagonal of a square matrix is the set of elements directly under the elements comprising the diagonal. For example, in the following matrix, the diagonal elements are denoted and the subdiagonals are denoted ,
Subdiagonal
See also
Diagonal, Jordan Block, Superdiagonal, Tridiagonal MatrixExplore with Wolfram|Alpha
References
Faddeeva, V. N. Computational Methods of Linear Algebra. New York: Dover, p. 50, 1958.Referenced on Wolfram|Alpha
SubdiagonalCite this as:
Weisstein, Eric W. "Subdiagonal." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Subdiagonal.html