2 citations · 4 across the 15 of their papers we have counts for
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Group Theoretical Characterizations of Rationality
Andriy Regeta, Christian Urech, Immanuel van Santen
Let X be an irreducible variety and Bir(X) its group of birational transformations. We show that the group structure of Bir(X) determines whether X is rational and whether X is rul…
The Structure of Algebraic Families of Birational Transformations
Andriy Regeta, Christian Urech, Immanuel van Santen
We give a description of the algebraic families of birational transformations of an algebraic variety X. As an application, we show that the morphisms to Bir(X) given by algebraic…
The Automorphism groups of zero-dimensional monomial algebras
Roberto Díaz, Alvaro Liendo, Gonzalo Manzano-Flores +1
A monomial algebra B is defined as a quotient of a polynomial ring by a monomial ideal, which is an ideal generated by a finite set of monomials. In this paper, we determine the au…
Bracket width of current Lie algebras
Boris Kunyavskii, Ievgen Makedonskyi, Andriy Regeta
The length of an element of a Lie algebra is defined as the smallest number needed to represent as a sum of brackets. The bracket width of is defined as sup…