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Loop transversals and the centralizer ring of a permutation group

  • K. W. Johnson (a1)
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Many of the basic concepts in this paper are defined in (2), and it will be useful to the reader if he is familiar with that paper. In it the concept of a loop transversal to a subgroup S of a group G is defined and discussed, where if G is a transitive permutation group and no explicit S is mentioned it is assumed that S is a point stabilizer. In (3) there appeared the following problem (P):

Let G be a transitive permutation group which is 2-closed.

(i) Is there a fixed-point-free transversal in G (i.e. to a point stabilizer)?

(ii) Is there a loop transversal in G?

Unfortunately a note was added in which it was falsely stated that the answer to both (i) and (ii) is yes.

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References
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(1)Hall, M.Combinatorial Theory (Blaisdell, Massachusetts, 1967).
(2)Johnson, K. W.S-rings over loops, right mapping groups and transversals in permutation groups. Math. Proc. Cambridge Philos. Soc. 89 (1981), 433443.
(3)Johnson, K. W.Transversals, S-rings and centralizer rings of groups. Proceedings Algebra Carbondale 1980. Springer Lecture Notes, vol. 848, pp. 169177.
(4)Wieland, H.Finite permutation groupa (Academic Press, New York, London, 1964).
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Mathematical Proceedings of the Cambridge Philosophical Society
  • ISSN: 0305-0041
  • EISSN: 1469-8064
  • URL: /core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society
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