3 papers
math.GR2025
Gorenstein versions of type groups and some Gcd-cd, Ghd-hd coincidences
Rudradip Biswas, Dimitra-Dionysia Stergiopoulou
In this short note, we characterise some Gorenstein versions of the concept of a group being of type as introduced by Olympia Talelli. And, we also generalize a different Talel…
math.CO2025
Total trades, intersection matrices and Specht modules
Mihalis Maliakas, Dimitra-Dionysia Stergiopoulou
Trades are important objects in combinatorial design theory that may be realized as certain elements of kernels of inclusion matrices. Total trades were introduced recently by Ghor…
math.RA2025
Gorenstein analogues of a projectivity criterion over group algebras
Rudradip Biswas, Dimitra-Dionysia Stergiopoulou
We formulate and answer Gorenstein projective, flat, and injective analogues of a classical projectivity question for group rings under some mild additional assumptions. Although t…