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- W1565943896 abstract "An algorithm for reduction of a regular matrix pair (A, B) to block Hessenberg-triangular form is presented. This condensed form Q T (A,B)Z = (H,T), where H and T axe block upper Hessenberg and upper triangular, respectively, and Q and Z orthogonal, may serve as a first step in the solution of the generalized eigenvalue problem Ax = λBx. It is shown how an elementwise algorithm can be reorganized in terms of blocked factorizations and higher level BLAS operations. Several ways to annihilate elements are compared. Specifically, the use of Givens rotations, Householder transformations, and combinations of the two. Performance results of the different variants are presented and compared to the LAPACK implementation DGGHRD, which indeed is unblocked." @default.
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- W1565943896 date "1996-01-01" @default.
- W1565943896 modified "2023-09-27" @default.
- W1565943896 title "Reduction of a regular matrix pair (A, B) to block Hessenberg-triangular form" @default.
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- W1565943896 doi "https://doi.org/10.1007/3-540-60902-4_15" @default.
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