3 papers
math.RA2020
Simplicity of inverse semigroup and étale groupoid algebras
Benjamin Steinberg, Nóra Szakács
In this paper, we prove that the algebra of an étale groupoid with totally disconnected unit space has a simple algebra over a field if and only if the groupoid is minimal and effe…
math.CO2018
Inverse monoids of partial graph automorphisms
Robert Jajcay, Tatiana Jajcayova, Nóra Szakács +1
A partial automorphism of a finite graph is an isomorphism between its vertex induced subgraphs. The set of all partial automorphisms of a given finite graph forms an inverse monoi…
math.RA2012
On the number of slim, semimodular lattices
Gábor Czédli, Tamás Dékány, László Ozsvárt +2
A lattice L is slim if it is finite and the set of its join-irreducible elements contains no three-element antichain. Slim, semimodular lattices were previously characterized by G.…