3 papers
math.AG2026
Open surfaces with a triangle at infinity
Dmitriy Chunaev, Alexander Perepechko, Daniil Shunin
A triangle surface is an open algebraic surface completed by a triangle of contractible -curves. We establish a combinatorial description of their completions. We also show t…
math.AG2026
Isotropy subgroups of homogeneous locally nilpotent derivations
Dmitriy Chunaev, Polina Evdokimova
We say that a locally nilpotent derivations is maximal if there are no inequivalent locally nilpotent derivations that commute with . The paper gives a description of isotro…
math.AG2023
Varieties with a torus action of complexity one having a finite number of automorphism group orbits
Sergey Gaifullin, Dmitriy Chunaev
In this work we obtain sufficient conditions for a variety with a torus action of complexity one to have a finite number of automorphism group orbits.