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Decompositions of algebras over ℝ and ℂ

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Abstract

We consider the boolean complexity of the decomposition of matrix algebras over ℂ and ℝ with bases consisting of matrices over a number field. Deterministic polynomial time algorithms for the decomposition of semi-simple algebras over these fields and Las Vegas polynomial time algorithms for the decomposition of simple algebras are obtained.

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Eberly, W. Decompositions of algebras over ℝ and ℂ. Comput Complexity 1, 211–234 (1991). https://doi.org/10.1007/BF01200061

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