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• W1964724053 abstract "In this article we present a fast recursive orthogonalization scheme for two important subspaces of the Macaulay matrix: its row space and null space. It requires a graded monomial ordering and exploits the resulting structure of the Macaulay matrix induced by this graded ordering. The resulting orthogonal basis for the row space will retain a similar structure as the Macaulay matrix and is as a consequence sparse. The computed orthogonal basis for the null space is dense but typically has smaller dimensions. Two alternative implementations for the recursive orthogonalization scheme are presented: one using the singular value decomposition and another using a sparse rank revealing multifrontal QR decomposition. Numerical experiments show the effectiveness of the proposed recursive orthogonalization scheme in both running time and required memory compared to a standard orthogonalization. The sparse multifrontal QR implementation is superior in both total run time and required memory at the cost of being slightly less reliable for determining the numerical rank." @default.
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• W1964724053 date "2014-09-01" @default.
• W1964724053 modified "2023-09-26" @default.
• W1964724053 title "A fast recursive orthogonalization scheme for the Macaulay matrix" @default.
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• W1964724053 doi "https://doi.org/10.1016/j.cam.2014.01.035" @default.
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