3 papers
cs.LO2026
Discrete dualities for some algebras from rough sets
Ivo Düntsch, Ewa OrÅowska
A discrete duality is a relationship between classes of algebras and classes of relational systems (frames) resulting in two representation theorems building on the early work of J…
cs.LO2025
The fork and its role in unification of closure algebras
Ivo Düntsch, Wojciech Dzik
We consider the two-pronged fork frame and the variety generated by its dual closure algebra . We describe the finite projective algebras in $\mathbf{Eq…
math.HO2025
The Evolution of Rough Sets 1970s-1981
Viktor Marek, Ewa OrÅowska, Ivo Düntsch
In this note research and publications by ZdzisÅaw Pawlak and his collaborators from 1970s and 1981 are recalled. Focus is placed on the sources of inspiration which one can ident…