Landau's theorem on conjugacy classes for normal subgroups
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Scholar |
Otros documentos de la autoría: Beltrán, Antonio; Felipe, Maria José; Melchor Borja, Carmen
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http://dx.doi.org/10.1142/S0218196716500624 |
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Título
Landau's theorem on conjugacy classes for normal subgroupsFecha de publicación
2016-10-10Editor
World ScientificCita bibliográfica
BELTRÁN FELIP, Antonio; FELIPE, María José; MELCHOR BORJA, Carmen. Landau's theorem on conjugacy classes for normal subgroups. International Journal of Algebra and Computation (2016), v. 26, n. 7, pp. 1453-1466Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.worldscientific.com/doi/abs/10.1142/S0218196716500624Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Landau’s theorem on conjugacy classes asserts that there are only finitely many finite groups, up to isomorphism, with exactly k conjugacy classes for any positive integer k. We show that, for any positive integers n ... [+]
Landau’s theorem on conjugacy classes asserts that there are only finitely many finite groups, up to isomorphism, with exactly k conjugacy classes for any positive integer k. We show that, for any positive integers n and s, there exist finitely many finite groups G, up to isomorphism, having a normal subgroup N of index n which contains exactly s non-central G-conjugacy classes. Upper bounds for the orders of G and N are obtained; we use these bounds to classify all finite groups with normal subgroups having a small index and few G-classes. We also study the related problems when we consider only the set of G-classes of prime-power order elements contained in a normal subgroup. [-]
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International Journal of Algebra and Computation (2016), v. 26, n. 7Derechos de acceso
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