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Finding the smallest image of a set

Published: 04 July 2004 Publication History

Abstract

We describe an algorithm for finding a canonical image of a set of points under the action of a permutation group. Specifically if we order images by sorting them and ordering the resulting sequences lexicographically, we find the first image. This has applications to combinatorial and other search problems, allowing isomorphic results to be eliminated more efficiently.We give worst-case asymptotic running time estimates and practical results obtained with a GAP implementation.

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Eugene M. Luks. Permutation groups and polynomial-time computation. In Groups and computation New Brunswick, NJ, 1991, volume 11 of DIMACS Ser. Discrete Math. Theoret. Comput. Sci., pages 139--175. Amer. Math. Soc., Providence, RI, 1993.
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Akos Seress. Permutation group algorithms, volume 152 of Cambridge Tracts in Mathematics. Cambridge University Press, Cambridge, 2003.
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Charles C. Sims. Determining the conjugacy classes of a permutation group. In Computers in algebra and number theory Proc. SIAM-AMS Sympos. Appl. Math., New York, 1970, pages 191--195. SIAM--AMS Proc., Vol. IV. Amer. Math. Soc., Providence, R.I., 1971.
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cover image ACM Conferences
ISSAC '04: Proceedings of the 2004 international symposium on Symbolic and algebraic computation
July 2004
334 pages
ISBN:158113827X
DOI:10.1145/1005285
  • General Chair:
  • Josef Schicho
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Published: 04 July 2004

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  1. algorithm
  2. permutation group
  3. smallest image

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