mql5-skills/skills/mql5/references/docs/06-matrix/0379-matrix-matrix-classification-matrix-isuppertriangular.md

IsUpperTriangular

Check if a square matrix is upper triangular.

bool matrix::IsUpperTriangular();

Return Value

True if square matrix is upper triangular.

Note

Zero matrix of n-by-n size is triangular. Diagonal matrix is triangular. Bidiagonal matrix is triangular.

Check if lower triangular part under the main diagonal contains all zeros.

Upper triangular matrix

 
   v  v  v  v  v  v
   0  v  v  v  v  v
   0  0  v  v  v  v
   0  0  0  v  v  v
   0  0  0  0  v  v
   0  0  0  0  0  v