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Research Article Open access CC BY 4.0

Length Functions and HNN Groups

Faisal H. Nesayef

Journal of Scientific Research and Reports · pp. 1–8 · Published 26 May 2017

10.9734/JSRR/2017/33282

Abstract

The concept of length functions on groups is first introduced by Lyndon. This is used to give direct proofs of many other results in combinatorial group theory. Two important sets called M and N satisfying some certain axioms of length functions are considered. Finally investigations of the nature and the structures of the sets M and N in relation to the elements of HNN group were carried out.

Archimedean elements associated subgroups conjugate elements Coset representative H. N. N extension isomorphism length functions normal form reduced word.

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