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JOURNALS // Matematicheskie Zametki // Archive

Mat. Zametki, 1973 Volume 14, Issue 1, Pages 127–132 (Mi mzm7213)

Finite simple groups whose Sylow 2-subgroups possess an extra-special subgroup of index 2

V. V. Kabanov, V. D. Mazurov, S. A. Syskin

Institute of Mathematics, Siberian Branch of USSR Academy of Sciences

Abstract: Let $G$ be a finite simple group with Sylow 2-subgroup $T$. If there is an extra-special sub-group of index 2 in $T$, then $G$ is isomorphic to one of the following groups:
$$
\begin{array}{llllll} A_8,&A_9,&M_{11},&M_{12}\\ L_2(q),&L_3(q),&U_3(q),&G_2(q),&D_4^2(q),&PSp_4(q) \end{array}
$$
for an appropriate odd $q$.

UDC: 519.4

Received: 05.06.1972


 English version:
Mathematical Notes, 1973, 14:1, 629–632

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