3 papers
math.QA2026
Point modules of Nichols algebras over non-abelian groups
B. Greenfeld, L. Vendramin, S. Venkatesh
Nichols algebras are among the most important and mysterious objects in quantum algebra. We continue the systematic program of studying them through their point modules. We study t…
math.GR2026
How Many Reflections Make a Dihedral Set Large?
Be'eri Greenfeld, George King, Xiaoxuan Li +1
Given a size- subset of a group , how large can the product set be? We study this question, at several layers of refinement, for the infinite dihedral group. First,…
math.CO2025
Complexity and recurrence in infinite words and related structures
Be'eri Greenfeld, Carlos Gustavo Moreira, Efim Zelmanov
We study the asymptotics and fine-scale behavior of quantitative combinatorial measures of infinite words and related dynamical and algebraic structures. We construct infinite recu…