Sandwich semigroups in locally small categories II: Transformations

Fix sets $X$ and $Y$, and write $\mathcal{PT}_{XY}$ for the set of all partial functions $X\to Y$. Fix a partial function $a:Y\to X$, and define the operation $\star_a$ on $\mathcal{PT}_{XY}$ by $f\star_ag=fag$ for $f,g\in\mathcal{PT}_{XY}$. The sandwich semigroup $(\mathcal{PT}_{XY},\star_a)$ is de...

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Hauptverfasser:	Dolinka, Igor, Ðurđev, Ivana, East, James, Honyam, Preeyanuch, Sangkhanan, Kritsada, Sanwong, Jintana, Sommanee, Worachead
Format:	Artikel
Sprache:	eng
Schlagworte:	Mathematics - Category Theory Mathematics - Group Theory Mathematics - Rings and Algebras
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