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math.AG2017
Smooth contractible threefolds with hyperbolic -actions via ps-divisors
Charlie Petitjean
The aim of this note is to give an alternative proof of a theorem of Koras and Russell, that is, a characterization of smooth contractible affine varieties endowed with a hyperboli…
math.AG2017
Uniformly rational varieties with torus action
Alvaro Liendo, Charlie Petitjean
A smooth variety is called uniformly rational if every point admits a Zariski open neighborhood isomorphic to a Zariski open subset of the affine space. In this note we show that e…