Extending the dual of the Petersen graph.
Meixner, Thomas (1997)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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Meixner, Thomas (1997)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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Leemans, Dimitri, Rowley, Peter (2010)
The Electronic Journal of Combinatorics [electronic only]
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Ali Nesin (1990)
Compositio Mathematica
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Martyn Dixon, Yalcin Karatas (2012)
Open Mathematics
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In this paper we investigate the structure of X-groups in which every subgroup is permutable or of finite rank. We show that every subgroup of such a group is permutable.
Maria De Falco, Francesco de Giovanni, Carmela Musella (2013)
Colloquium Mathematicae
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It is proved that if a locally soluble group of infinite rank has only finitely many non-trivial conjugacy classes of subgroups of infinite rank, then all its subgroups are normal.
Sarli, John, McClurg, Phillip (2001)
Advances in Geometry
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Gottschalk, Harald (1996)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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Steinbach, Anja (2003)
Advances in Geometry
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B. A. F. Wehrfritz (2012)
Rendiconti del Seminario Matematico della Università di Padova
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Francesco de Giovanni, Federica Saccomanno (2014)
Colloquium Mathematicae
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It is proved that if G is a locally (soluble-by-finite) group of infinite rank in which every proper subgroup of infinite rank contains an abelian subgroup of finite index, then all proper subgroups of G are abelian-by-finite.
Lempken, Wolfgang, van Trung, Tran (2005)
Experimental Mathematics
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Paul Hill, Charles Megibben (1993)
Rendiconti del Seminario Matematico della Università di Padova
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John G. Thompson (1966-1968)
Séminaire Bourbaki
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