Spanning trees of 2-complexes from diagram groups over the construction of semigroup presentation of integers using lifting method

• Main Authors: Gheisari, Yousof, Ahmad, Abd Ghafur, Chaharborj, S. Seddigh, Sapar, Siti Hasana, Mohd Atan, Kamel Ariffin
• Format: Article
• Language: English
• Published: Institute for Mathematical Research, Universiti Putra Malaysia 2012
• Online Access: http://psasir.upm.edu.my/id/eprint/38927/1/38927.pdf; http://psasir.upm.edu.my/id/eprint/38927/; http://einspem.upm.edu.my/journal/fullpaper/vol6no2/6.%20Yousof%20Gheisariedited.pdf

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 tr...