An upper triangular matrix is defined by
(1)
|
Written explicitly,
(2)
|
A lower triangular matrix is defined by
(3)
|
Written explicitly,
(4)
|
An upper triangular matrix is defined by
(1)
|
Written explicitly,
(2)
|
A lower triangular matrix is defined by
(3)
|
Written explicitly,
(4)
|
Weisstein, Eric W. "Triangular Matrix." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TriangularMatrix.html