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On the laws of the variety se

  • Roger M. Bryant (a1)

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A group is called an s-group if it is locally finite and all its Sylow subgroups are abelian. Kovács [4] has shown that, for any positive integer e, the class se of all s-groups of exponent dividing e is a (locally finite) variety. The proof of this relies on the fact that, for any e, there are only finitely many (isomorphism classes of) non-abelian finite simple groups in se; and this is a consequence of deep results of Walter and others (see [6]). In [2], Christensen raised the finite basis question for the laws of the varieties se. It is easy to establish the finite basis property for an se which contains no non-abelian finite simple group; and Christensen gave a finite basis for the laws of the variety s30, whose only non-abelian finite simple group is PSL(2,5). Here we prove Theorem For any positive integer e, the varietysehas a finite basis for its laws.

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References

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[1]Roger, M. Bryant, ‘On locally finite varieties of groups’, Proc. London Math. Soc. (3) 24 (1972), 395408.
[2]Christensen, C., ‘A basis for the laws of the variety s 30’, J. Austral. Math. Soc. 10 (1969), 493496.
[3]Huppert, B., Endliche Gruppen I (Springer-Verlag, Berlin, 1967).
[4]Kovács, L. G., ‘Varieties and finite groups’, J. Austral. Math. Soc. 10 (1969), 519.
[5]Neumann, Hanna, Varieties of Groups (Springer-Verlag, Berlin, 1967).
[6]John, H. Walter, ‘The characterization of finite groups with abelian Sylow 2-subgroups’, Ann. of Math. 89 (1969), 405514.
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On the laws of the variety se

  • Roger M. Bryant (a1)

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