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GRAPHS AND GROUPS, GEOMETRIES AND GAP - G2G2 (MS-7)

a subgroup of a group t Zi Symni, where Zi ∈ {1, C3} for each i, such that H projects
i=1
t
onto i=1 S ymni , and we have obtained a criterium of pronormality of such a subgroup in

such a group [10]. All these works were supported by the Russian Science Foundation (project

19-71-10067). These investigations give a rise to researches on effective algorithms (to be

implemented in GAP) for deciding the pronormality of a subgroup of odd index in a finite

simple group. This is a joint project with Stephen Glasby and Cheryl E. Praeger.

References

[1] L. Babai, Isomorphism problem for a class of point-symmetric structures, Acta Math.
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[2] W. Guo, N. V. Maslova, D. O. Revin, On the pronormality of subgroups of odd index in
some extensions of finite groups, Siberian Math. J. 59:4 (2018) 610–622.

[3] W. Guo, D. O. Revin, Pronormality and submaximal X-subgroups in finite groups, Com-
munications in Mathematics and Statistics. 6:3 (2018) 289–317.

[4] A. S. Kondrat’ev, N. V. Maslova, D. O. Revin, On the pronormality of subgroups of odd
index in finite simple groups, Siberian Math. J. 56:6 (2015) 1101–1107.

[5] A. S. Kondrat’ev, N. V. Maslova, D. O. Revin, A pronormality criterion for supplements
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[8] A. S. Kondrat’ev, N. V. Maslova, D. O. Revin, On the pronormality of subgroups of odd
index in finite simple groups, Groups St Andrews 2017 in Birmingham (Birmingham, 5th-
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[9] A. S. Kondrat’ev, N. V. Maslova, D. O. Revin, Finite simple exceptional groups of Lie type
in which all the subgroups of odd index are pronormal, arXiv:1910.02524v2 [math.GR].

[10] N. V. Maslova, D. O. Revin, On the pronormality of subgroups of odd index in some direct
products of finite groups, in preparation.

[11] P. P. Palfy, isomorphism problem for relational structures with a cyclic automorphism,
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[12] Ch. E. Praeger, On transitive permutation groups with a subgroup satisfying a certain
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[13] E. P. Vdovin, D. O. Revin, Pronormality of Hall subgroups in finite simple groups,
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