On the Uniqueness of Some Affinely Flat Infra-nilmanifolds.
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Displaying 261 – 274 of 274
On the verbal width of finitely generated pro- groups.
A Jaikin-Zapirain (2008)
Revista Matemática Iberoamericana
On the volumes of hyperbolic 5-orthoschemes and the Trilogarithm.
Ruth Kellerhals (1992)
Commentarii mathematici Helvetici
On Tits' conjecture and other questions concerning Artin and generalized Artin groups.
S.J. Pride (1986)
Inventiones mathematicae
On totally inert simple groups
Martyn Dixon, Martin Evans, Antonio Tortora (2010)
Open Mathematics
A subgroup H of a group G is inert if |H: H ∩ H g| is finite for all g ∈ G and a group G is totally inert if every subgroup H of G is inert. We investigate the structure of minimal normal subgroups of totally inert groups and show that infinite locally graded simple groups cannot be totally inert.
On transitivity of pronormality
Leonid A. Kurdachenko, Igor Ya. Subbotin (2002)
Commentationes Mathematicae Universitatis Carolinae
This article is dedicated to soluble groups, in which pronormality is a transitive relation. Complete description of such groups is obtained.
On universal theories of metabelian groups and the Shmel'kin embedding.
Timoshenko, E.I. (2001)
Sibirskij Matematicheskij Zhurnal
On variants of a theorem of Schur.
Hilton, Peter (2005)
International Journal of Mathematics and Mathematical Sciences
One-Relator Groups and the Lower Central Series. II. Invariants of One-Relator Groups.
Kathryn J. Horadam (1982)
Mathematische Zeitschrift
Operator Algebras Associated with Free Products of Groups with Amalgamation.
Erik Bédos (1984)
Mathematische Annalen
Optics in Croke-Kleiner Spaces
Fredric D. Ancel, Julia M. Wilson (2010)
Bulletin of the Polish Academy of Sciences. Mathematics
We explore the interior geometry of the CAT(0) spaces , constructed by Croke and Kleiner [Topology 39 (2000)]. In particular, we describe a diffraction effect experienced by the family of geodesic rays that emanate from a basepoint and pass through a certain singular point called a triple point, and we describe the shadow this family casts on the boundary. This diffraction effect is codified in the Transformation Rules stated in Section 3 of this paper. The Transformation Rules have various applications....
Order Reduced Reidemeister-Schreier Subgroup Presentations and Applications.
Heiner Zieschang, Edelgard Gramberg (1979)
Mathematische Zeitschrift
Orderable 3-manifold groups
Steven Boyer, Dale Rolfsen, Bert Wiest (2005)
Annales de l’institut Fourier
We investigate the orderability properties of fundamental groups of 3-dimensional manifolds. Many 3-manifold groups support left-invariant orderings, including all compact -irreducible manifolds with positive first Betti number. For seven of the eight geometries (excluding hyperbolic) we are able to characterize which manifolds’ groups support a left-invariant or bi-invariant ordering. We also show that manifolds modelled on these geometries have virtually bi-orderable groups. The question of virtual orderability...
Outer automorphism groups of Bieberbach groups.
Szczepański, Andrzej (1996)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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