3 papers
math.CO2025
Elliptic arrangements of complex multiplication type
Luca Moci, Roberto Pagaria, Maddalena Pismataro +1
We provide a natural definition of an elliptic arrangement, extending the classical framework to an elliptic curve E with complex multiplication. We analyse the intersections of el…
math.AT2024
Cohomology ring of non-compact abelian arrangements
Evienia Bazzocchi, Roberto Pagaria, Maddalena Pismataro
We give a Orlik-Solomon type presentation for the cohomology ring of arrangements in a non-compact abelian Lie group. The new insight consists in comparing arrangements in differen…
math.CO2023
Inductive and divisional posets
Roberto Pagaria, Maddalena Pismataro, Tan Nhat Tran +1
We call a poset factorable if its characteristic polynomial has all positive integer roots. Inspired by inductive and divisional freeness of a central hyperplane arrangement, we in…