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Affine spherical homogeneous spaces with good quotient by a maximal unipotent subgroup
Roman Avdeev
For an affine spherical homogeneous space G/H of a connected semisimple algebraic group G, we consider the factorization morphism by the action on G/H of a maximal unipotent subgro…
math.AG2011
An epimorphic subgroup arising from Roberts' counterexample
Roman Avdeev
In 1994, based on Roberts' counterexample to Hilbert's fourteenth problem, A'Campo-Neuen constructed an example of a linear action of a 12-dimensional commutative unipotent group H…