نتایج جستجو برای: amalgamated
تعداد نتایج: 964 فیلتر نتایج به سال:
An outbreak of aseptic meningitis has been ongoing in several areas of Latgale region, in the south-eastern part of Latvia since the end of June 2010. By 9 August 2010, 114 cases had been notified. Most of the cases were registered in the city and amalgamated municipality of Daugavpils and neighbouring territories. According to current evidence, two types of enteroviruses, coxsackie A-9 virus a...
The category of crossed complexes gives an algebraic model of CW-complexes and cellular maps. Free crossed resolutions of groups contain information on a presentation of the group as well as higher homological information. We relate this to the problem of calculating non-abelian extensions. We show how the strong properties of this category allow for the computation of free crossed resolutions ...
Stallings showed that a finitely generated group which has more than one end splits as an amalgamated free product or an HNN extension over a finite subgroup. Dunwoody gave a new geometric proof of the theorem for the class of almost finitely presented groups. Here we adapt the method to the class of finitely generated groups using Sageev’s generalisation of Bass Serre theory concerning group p...
We show that amalgams of nitely generated torsionfree nilpotent groups of class c along a cyclic subgroup satisfy a polynomial isoperimetric inequality of degree 4c. The distortion of the amalgamated subgroup is bounded above by a polynomial of degree c. We also give an example of a non-cyclic amalgam of nitely generated torsionfree nilpotent groups along an abelian, isolated and normal subgrou...
Paul Rouse and Martin Putterill Department of Accounting and Finance The University of Auckland New Zealand [email protected] ______________________________________________________________________ Abstract In 1989 several hundred New Zealand local government authorities were amalgamated into less than one hundred larger entities. The interest in this research is on determining preand post-...
of a group H, where A and B are isomorphic subgroups of H and φ : A → B is an isomorphism, results from adding to H a new generator t such that the conjugation of the subgroup A ≤ H by t realizes the isomorphism φ. We also say that A and B in (2) are the associated subgroups. One of the first important applications of HNN-extensions was a more transparent proof of the celebrated result of Novik...
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