K. Sangkhanan

collaborators

2 papers

math.GR2017

Sandwich semigroups in locally small categories II: Transformations

Igor Dolinka, Ivana Ðurđev, James East +4

Fix sets $X$ and $Y$ , and write $P T_{X Y}$ for the set of all partial functions $X \to Y$ . Fix a partial function $a : Y \to X$ , and define the operation $⋆_{a}$ on $\mathca…

math.GR2017

Sandwich semigroups in locally small categories I: Foundations

Igor Dolinka, Ivana Đurđev, James East +4

Fix (not necessarily distinct) objects $i$ and $j$ of a locally small category $S$ , and write $S_{ij}$ for the set of all morphisms $i \to j$ . Fix a morphism $a \in S_{j i}$ , and defi…