RRQR factorization
= RRQR factorization
{wiki=RRQR_factorization}
RRQR factorization is a matrix factorization method that decomposes a matrix \\( A \\) into the product of three matrices: \\( A = Q R R^T \\), where: - \\( A \\) is an \\( m \\times n \\) matrix (the matrix to be factored), - \\( Q \\) is an \\( m \\times k \\) orthogonal matrix (with columns that are orthonormal vectors, where \\( k \\leq \\min(m, n)