Browsing by Author "Zapata, Emilio L."
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HPF-2 Support for Dynamic Sparse Computations
Asenjo Plaza, Rafael; Plata, Oscar; Touriño, Juan; Zapata, Emilio L.; Doallo, Ramón (Springer, 1998)[Abstract] There is a class of sparse matrix computations, such as direct solvers of systems of linear equations, that change the fill-in (nonzero entries) of the coefficient matrix, and involve row and column operations ... -
Parallel Sparse Modified Gram-Schmidt QR Decomposition
Doallo, Ramón; Fraguela, Basilio B.; Touriño, Juan; Zapata, Emilio L. (Springer, 1996)[Abstract] We present a parallel computational method for the QR decomposition with column pivoting of a sparse matrix by means of Modified Gram-Schmidt orthogonalization. Nonzero elements of the matrix M to be decomposed ... -
Sparse Householder QR factorization on a mesh
Doallo, Ramón; Touriño, Juan; Zapata, Emilio L. (IEEE Computer Society, 1996-01)[Abstract] We analyze the parallelization of QR factorization by means of Householder transformations. This parallelization is carried out on a machine with a mesh topology (a 2-D torus to be more precise). We use a cyclic ...