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math.AG2006★ 19 cited
Birational geometry and deformations of nilpotent orbits
Yoshinori Namikawa
This is a continuation of math.AG/0408274, where we have described the relative movable cone for a Springer resolution of the closure of a nilpotent orbit in a complex simple Lie a…
math.AG2006★ 44 cited
Poisson deformations of affine symplectic varieties
Yoshinori Namikawa
We shall prove that the Poisson deformation functor of an affine (singular) symplectic variety is unobstructed. As a corollary, we prove the following result. Theorem: For an affin…