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- W2011818056 abstract "We introduce the concept of (epsilon) -displacement rank, that allows us to devise a fast algorithm for the approximate solution of BBBT/BTB (Block Banded Block Toeplitz with Banded Toeplitz Blocks) systems by means of cyclic reduction. We also introduce the concept of incomplete displacement block LU factorization of a Toeplitz-like matrix, where the displacement structure is imposed to the blocks of the factors L and U. The role of the matrix LU as preconditioner is discussed. Finally we propose another preconditioner obtained by extending a BBBT/BTB matrix to a banded Toeplitz matrix. Some open problems are addressed." @default.
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- W2011818056 date "1999-11-02" @default.
- W2011818056 modified "2023-09-23" @default.
- W2011818056 title "<title>Solving block-banded block Toeplitz systems with banded Toeplitz blocks</title>" @default.
- W2011818056 doi "https://doi.org/10.1117/12.367646" @default.
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