5 citations · 5 across the 2 of their papers we have counts for
2 papers
math.AG2007
The action of the Cremona group on the non-commutative ring
Alexandr Usnich
The Cremona group acts on the field of two independent commutative variables over complex numbers. We provide a non-commutative ring that is an analog of non-commutative field of t…
math.AG2006★ 5 cited
Symplectic automorphisms of CP^2 and the Thompson group T
Alexandr Usnich
We explain how to construct a morphism from the group of birational automorphisms of CP^2 preserving the logarithmic Poisson bracket to the Thompson group T. Than we give a linear…