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SIGMA THEORY AND TWISTED CONJUGACY CLASSES
(PACIFIC JOURNAL MATHEMATICS, 2010)
Using Sigma theory we show that for large classes of groups G there is a subgroup H of finite index in Aut(G) such that for phi is an element of H the Reidemeister number R(phi) is infinite. This includes all finitely ...
Profinite completions of orientable Poincare duality groups of dimension four and Euler characteristic zero
(European Mathematical SocZurichSuíça, 2009)
Entertainment recommender systems for group of users
(Pergamon-Elsevier Science Ltd, 2011-10)
Recommender systems are used to recommend potentially interesting items to users in different domains. Nowadays, there is a wide range of domains in which there is a need to offer recommendations to group of users instead ...
Free-by-Demushkin pro-p groups
(SpringerNew YorkEUA, 2005)
BASS CYCLIC UNITS AS FACTORS IN A FREE GROUP IN INTEGRAL GROUP RING UNITS
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2011)
Marciniak and Sehgal showed that if u is a non-trivial bicyclic unit of an integral group ring then there is a bicyclic unit v such that u and v generate a non-abelian free group. A similar result does not hold for Bass ...
The fundamental group of the p-subgroup complex
(Oxford University Press, 2020-09)
We study the fundamental group of the p-subgroup complex of a finite group G. We show first that pi1(A_3(Alt_{10})) is not a free group (here Alt_{10} is the alternating group on 10 letters). This is the first concrete ...
Comparing galaxy populations in compact and loose groups of galaxies: II. Brightest group galaxies
(EDP Sciences, 2013-08)
Aims: The properties of the brightest galaxies (BCGs) are studied in both compact and loose groups of galaxies in order to better understand the physical mechanisms influencing galaxy evolution in different environments. ...
Simple components of the center of FG/J(FG)
(TAYLOR & FRANCIS INC, 2008)
Let G be a finite group, F a field, FG the group ring of G over F, and J(FG) the Jacobson radical of FG. Using a result of Berman and Witt, we give a method to determine the structure of the center of FG/J(FG), provided ...
Some remarks about Poincaré duality pairs
(2012-07-01)
Bieri-Eckmann [6] introduced the concept of relative cohomology for a group pair (G, S), where G is a group and S is a family of subgroups of G and, by using that theory, they introduced the concept of Poincaré duality ...