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- W2138023897 abstract "We investigate the use of noncommutative Gröbner bases in solving partially prescribed matrix inverse completion problems. The types of problems considered here are similar to those in [Linear Algebra Appl. 223–224 (1995) 73]. There the authors gave necessary and sufficient conditions for the solution of a 2×2 block matrix completion problem. Our approach is quite different from theirs and relies on symbolic computer algebra. Here we describe a general method by which all block matrix completion problems of this type may be analyzed if sufficient computational power is available. We also demonstrate our method with an analysis of all 3×3 block matrix inverse completion problems with 11 blocks known and 7 unknown. We discover that the solutions to all such problems are of a relatively simple form. We then perform a more detailed analysis of a particular problem from the 31,824 3×3 block matrix completion problems with 11 blocks known and 7 unknown. A solution to this problem of the form derived in the above-mentioned reference is presented. Not only do we give a proof of our detailed result, but we describe the strategy used in discovering our theorem and proof, since it is somewhat unusual for these types of problems." @default.
- W2138023897 created "2016-06-24" @default.
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- W2138023897 date "2001-11-01" @default.
- W2138023897 modified "2023-09-25" @default.
- W2138023897 title "Using noncommutative Gröbner bases in solving partially prescribed matrix inverse completion problems" @default.
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- W2138023897 doi "https://doi.org/10.1016/s0024-3795(01)00382-2" @default.
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