3 papers
math.GR2023
Minimal cover groups
Peter J. Cameron, David Craven, Hamid Reza Dorbidi +2
Let be a set of finite groups. A finite group is called an \emph{-cover} if every group in is isomorphic to a subgroup of . An $\mat…
math.RA2023
Compressed commuting graphs of matrix rings
Ivan-Vanja Boroja, Hamid Reza Dorbidi, Damjana Kokol Bukovšek +1
In this paper we introduce compressed commuting graph of rings. It can be seen as a compression of the standard commuting graph (with the central elements added) where we identify…
math.CO2016
A graph which recognizes idempotents of a commutative ring
Hamid Reza Dorbidi, Saeid Alikhani
In this paper we introduce and study a graph on the set of ideals of a commutative ring . The vertices of this graph are non-trivial ideals of and two distinct ideals an…