45 citations · 114 across the 14 of their papers we have counts for
15 papers
-deformations of graded rings
Alessandro Ardizzoni, Paolo Saracco, Dragoş Ştefan
We prove in a very general framework several versions of the classical Poincaré-Birkhoff-Witt Theorem, which extend results from [BeGi, BrGa, CS, HvOZ, WW]. Applications and exampl…
Further Properties and Applications of Koszul Pairs
Adrian Manea, Dragoş Ştefan
Koszul pairs were introduced in [arXiv:1011.4243] as an instrument for the study of Koszul rings. In this paper, we continue the enquiry of such pairs, focusing on the description…
The cohomology ring of the 12-dimensional Fomin-Kirillov algebra
Dragos Stefan, Cristian Vay
The -dimensional Fomin-Kirillov algebra is defined as the quadratic algebra with generators , and which satisfy the relations and $ab+bc+ca=0=…
On de Rham Cohomology of Linear Categories
Andrei Chiteş, Mădălin Ciungu, Dragoş Ştefan
We define the Chern map from the Grothendieck group of a linear category C to the de Rham cohomology of C with coefficients in a DG-category. In order to achieve our goal, we defin…
Koszul pairs and applications
Pascual Jara Martínez, Javier López Peña, Dragoş Ştefan
Let be a semisimple ring. A pair is called almost-Koszul if is a connected graded -ring and is a compatible connected graded -coring. To an almost-Koszul…
A categorical approach to cyclic duality
Gabriella Böhm, Dragos Stefan
The aim of this paper is to provide a unifying categorical framework for the many examples of para-(co)cyclic modules arising from Hopf cyclic theory. Functoriality of the coeffici…