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Polynomial time solutions of some problems of computational algebra

Published: 01 December 1985 Publication History

Abstract

The first structure theory in abstract algebra was that of finite dimensional Lie algebras (Cartan-Killing), followed by the structure theory of associative algebras (Wedderburn-Artin). These theories determine, in a non-constructive way, the basic building blocks of the respective algebras (the radical and the simple components of the factor by the radical). In view of the extensive computations done in such algebras, it seems important to design efficient algorithms to find these building blocks.
We find polynomial time solutions to a substantial part of these problems. We restrict our attention to algebras over finite fields and over algebraic number fields. We succeed in determining the radical (the “bad part” of the algebra) in polynomial time, using (in the case of prime characteristic) some new algebraic results developed in this paper. For associative algebras we are able to determine the simple components as well. This latter result generalizes factorization of polynomials over the given field. Correspondingly, our algorithm over finite fields is Las Vegas.
Some of the results generalize to fields given by oracles.
Some fundamental problems remain open. An example: decide whether or not a given rational algebra is a noncommutative field.

References

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L. Bahai, W. M. Kaator, E. M. Luks, Computational eomplezittl lad the eldssificatiop o! }?nit~ simple groups, Proc. 24th IEEE Syrup. Found. Camp. $ci., Tuc.son, Arizona, 1983, 162-171.
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R.E. Beck, B. Kolman, I. N. Stewart, Computing the structure o! o Lie algebra, Computers in nonassociarve rings and algebras, Academic Press, New 'fork-San Francisco- London, 1077, 167-188.
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E. R, Bcrlekamp, Factoring polynomials over large finite/ields, Math. Camp. 24 (1070), 713-715.
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A. Borodin, $. Cook, N. Pippenger, Parallel computation,for well. emtowed rings and sptsee-bounded probabillstic machines, !nfoxmation and Control 58 (1983), 113-~3G.
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A.L. Chistov, D. Yu. Grigoryev, Pollmomid-time/he. taring o! the multlvgriable polgnomiale o~cr i global field, LOMI preprint, Leningrad 17~2. (to appeaz in J. of Symbolic Computation)
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L.E. Dickson, Algebras and their srlthmctics, University of Chicago, 1923.
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I.N. Hcrsteia, Nonco;nmutative rings, Math. Assoc. of America, 1968.
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N. Jacobson, Lie a/;ebras, John Wiley, New York- London, 1962.
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D. E',. Kauth, TAe art o! computer prograraming, Vol. t, Seminstmerical algorithms, Addison-Wesley, Reading, 1981.
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S. Landau, Factoring pollmornials o~er 41itebs'aie number fields is in polynomial time, SIAM J. Cor~p., 1085, to appear
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A.K. Lea~tra, Factoring pollfnomials over algebraic number fields, in: Proc. Eurocal'83, Springer Lect. Notes ia Camp. ScL vol. 162, 245-254.
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A.K. Leastra, H. W. Lenstra, L. I,ov~z, Factoring polynomials with rational cocfficicnts, Math. Ann. 261 (1982), 515-534.
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M.O. Rabid, Probabilistic algorithms in .finitt ji~lda, SIAM J. Camp. 9 (1980), 273-280.

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cover image ACM Conferences
STOC '85: Proceedings of the seventeenth annual ACM symposium on Theory of computing
December 1985
484 pages
ISBN:0897911512
DOI:10.1145/22145
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 01 December 1985

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STOC85: Annual ACM Conference on Theory of Computing
May 6 - 8, 1985
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Cited By

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  • (2023)On p-Group Isomorphism: Search-to-Decision, Counting-to-Decision, and Nilpotency Class Reductions via TensorsACM Transactions on Computation Theory10.1145/362530816:1(1-39)Online publication date: 24-Sep-2023
  • (2023)An Extension of Overbeck’s Attack with an Application to Cryptanalysis of Twisted Gabidulin-Based SchemesPost-Quantum Cryptography10.1007/978-3-031-40003-2_1(3-37)Online publication date: 10-Aug-2023
  • (2022)On efficient noncommutative polynomial factorization via higman linearizationProceedings of the 37th Computational Complexity Conference10.4230/LIPIcs.CCC.2022.12(1-22)Online publication date: 20-Jul-2022
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  • (2022)Explicit isomorphisms of quaternion algebras over quadratic global fieldsResearch in Number Theory10.1007/s40993-022-00380-38:4Online publication date: 1-Oct-2022
  • (2021)On p-group isomorphismProceedings of the 36th Computational Complexity Conference10.4230/LIPIcs.CCC.2021.16Online publication date: 20-Jul-2021
  • (2021)Tensor products of coherent configurationsFrontiers of Mathematics10.1007/s11464-021-0975-917:5(829-852)Online publication date: 27-Sep-2021
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  • (2020)Learning sums of powers of low-degree polynomials in the non-degenerate case2020 IEEE 61st Annual Symposium on Foundations of Computer Science (FOCS)10.1109/FOCS46700.2020.00087(889-899)Online publication date: Nov-2020
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