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Spanning trees of 2-complexes from diagram groups over the construction of semigroup presentation of integers using lifting method
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نویسنده
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gheisari y. ,ahmad a.g.b. ,chaharborj s.s. ,sapar s.h. ,atan k.a.m.
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منبع
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malaysian journal of mathematical sciences - 2012 - دوره : 6 - شماره : 2 - صفحه:213 -223
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چکیده
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For any given semigroup presentation we may obtain the fundamental group. in this paper we will determine spanning trees for the 2-complexes of the fundamental groups obtained from the union of two semigroup presentations with finite different initial generators using lifting method. the spanning trees will be systematically selected by using lifting method according to the length of words. also the general formula for all lifts of spanning trees and the number of edges in the spanning trees will be computed.
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کلیدواژه
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Fundamental group; Generators; Semigroup presentation; Spanning tree
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آدرس
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school of mathematical science,faculty of science and technology,universiti kebangsaan malaysia,43600 ukm bangi,selangor,malaysia,department of mathematics,islamic azad university,bushehr branch, ایران, Universiti Kebangsaan Malaysia, Malaysia, Universiti Putra Malaysia, Malaysia, Universiti Putra Malaysia, Malaysia, Universiti Putra Malaysia, Malaysia
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Authors
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