On the group .
Fajziev, Valerij (2000)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Fajziev, Valerij (2000)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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G. Miller (1902)
Prace Matematyczno-Fizyczne
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Shokuev, V. N. (2001)
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Wenbin Guo, Alexander N. Skiba, Nanying Yang (2013)
Rendiconti del Seminario Matematico della Università di Padova
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J. Alejandro Díaz-Barriga, Francisco González-Acuña, Francisco Marmolejo, Leopoldo Román (2004)
Revista Matemática Complutense
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Given a generating family
Emilio Bujalance (1981)
Revista Matemática Hispanoamericana
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By a non-Euclidean crystallographic (N.E.C.) group we shall mean a discrete subgroup Γ of isometries of the non-Euclidean plane including those reverse orientation, reflections and glide-reflections. In [1] we computed the proper periods of normal N.E.C. subgroups of an N.E.C. group, when the index of the group with respect to the subgroup is odd. In this paper we shall compute the proper period of normal N.E.C. subgroups, when the index is even. The corresponding...
Al-Sharo, K. (2008)
Beiträge zur Algebra und Geometrie
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Huaguo Shi, Zhangjia Han (2012)
Colloquium Mathematicae
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We describe finite groups which contain just one conjugate class of self-normalizing subgroups.
Megibben, Charles, Ullery, William (2001)
Commentationes Mathematicae Universitatis Carolinae
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Mostaghim, Z. (2008)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
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Yılmaz Özgür, Nihal (2003)
Beiträge zur Algebra und Geometrie
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Jaraden, Jehad J. (2008)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
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Irene Zimmermann (1989)
Mathematische Zeitschrift
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Mysovskikh, V.I. (2002)
Zapiski Nauchnykh Seminarov POMI
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Kurdachenko, L. A., Subbotin, I. Ya. (2011)
Serdica Mathematical Journal
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2000 Mathematics Subject Classification: 20F16, 20E15. Groups in which every contranormal subgroup is normally complemented has been considered. The description of such groups G with the condition Max-n and such groups having an abelian nilpotent residual satisfying Min-G have been obtained.