1. Institute of Mathematics and Computer Science, Wroclaw University of Technology, 50-370, Wroclaw, Poland 2. Department of Mathematics, Pedagogical University, 21100, Vinnitsa, Ukraine
Abstract:
We give an abstract characterization of algebras of partial functions from An to A endowed with the operations of the Menger superposition and the set-theoretic difference of functions as subsets of An+1.