!! used as default html header if there is none in the selected theme. Triangmult

Triangmult --- Introduction ---

Triangmult is an exercise on the multiplication of matrices: one knows that if C is a square matrix of size , then there exist two matrices A and B of the same size, one is upper triangular, the other lower triangular, such that C =A B.
The server will therefore give you such a randomly generated matrix C of size . And you are asked to find the matrices A and B.
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