Abstract
In this paper we prove that if G is a finite exceptional simple group of Lie type, then G admits a 2-covering if, and only if, it is one of the following groups: \({G_2(2^{a}), F_4(3^{a}), G_2(2)', ^{2}G_2(3)', ^{2}F_4(2)'}\). Furthermore, if G is a finite sporadic simple group, then G admits a 2-covering if, and only if, G = M11.
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Pellegrini, M.A. 2-Coverings for exceptional and sporadic simple groups. Arch. Math. 101, 201–206 (2013). https://doi.org/10.1007/s00013-013-0562-8
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DOI: https://doi.org/10.1007/s00013-013-0562-8