The Extension of Diagram Group over Semigroup Presentation
Kalthom Mahmood Almabrok · Asian Research Journal of Mathematics · 2023
In this paper, we will discuss the diagram groups from union of two semigroup presentations namely 2S , =, 3S = and their two complex graphs will be presented. The covering space will be determined by selecting normal subgroup from diagram group that previously obtained from 2S U3S . Finally, the number of generator and relations of the diagram group can be computed.