mql5-skills/skills/mql5/references/docs/06-matrix/0380-matrix-matrix-classification-matrix-islowertriangular.md

IsLowerTriangular

Check if a square matrix is lower triangular.

bool matrix::IsLowerTriangular();

Return Value

True if square matrix is lower triangular.

Note

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

Check if upper triangular part above the main diagonal contains all zeros.

Lower triangular matrix

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