Abstract
The spectrum of a finite group is the set of its element orders. Two groups are isospectral whenever they have the same spectra. We consider the classes of finite groups isospectral to the simple symplectic and orthogonal groups B 3(q), C 3(q), and D 4(q). We prove that in the case of even characteristic and q > 2 these groups can be reconstructed from their spectra up to isomorphisms. In the case of odd characteristic we obtain a restriction on the composition structure of groups of this class.
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Original Russian Text Copyright © 2012 Staroletov A. M.
The author was supported the State Maintenance Program for the Leading Scientific Schools of the Russian Federation (Grants NSh-3669.2010.1 and MK-2136.2010.1), the Program “Development of the Scientific Potential of Higher Education” of the Russian Federal Agency for Education (Grant 2.1.1.10726), the Federal Target Program “Scientific and Educational Personnel of Innovation Russia” for 2009–2013 (State Contracts 02.740.11.0429 and 02.740.11.5191), and the Lavrent’ev Grant for Young Scientists of the Siberian Division of the Russian Academy of Sciences (Resolution No. 43 of 04.02.2010).
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Translated from Sibirskiĭ Matematicheskiĭ Zhurnal, Vol. 53, No. 3, pp. 663–671, May–June, 2012.
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Staroletov, A.M. On recognition by spectrum of the simple groups B 3(q), C 3(q), and D 4(q). Sib Math J 53, 532–538 (2012). https://doi.org/10.1134/S0037446612020334
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DOI: https://doi.org/10.1134/S0037446612020334