4 papers
New partial orders on Rickart *-rings
Cecilia Rossana Cimadamore, Laura Alicia Rueda, Melina Vanina Verdecchia
In this paper, we define and study partial orders on a Rickart *-ring obtained by imposing an additional condition on the star and the one-sided star partial orders. For each such…
Lattice properties of the sharp partial order
Cecilia R. Cimadamore, Laura A. Rueda, Néstor Thome +1
The aim of this paper is to study lattice properties of the sharp partial order for complex matrices having index at most 1. We investigate the down-set of a fixed matrix under…
Morita invariance for infinitesimal deformations
María Julia Redondo, Lucrecia Román, Fiorela Rossi Bertone +1
Let and be two Morita equivalent finite dimensional associative algebras over a field . It is well known that Hochschild cohomology is invariant under Morita equival…
On the existence and construction of proper costratifying systems
Octavio Mendoza, Maria Inés Platzeck, Melina Verdecchia
In this paper we further study the notion of proper costratifying systems, defined in \cite{MPV}. We give sufficient conditions for their existence, and investigate the relation be…