Incompressibility of Products by Grassmannians of Isotropic Subspaces
نویسنده
چکیده
We prove that the product of an arbitrary projective homogeneous variety Y by an orthogonal, symplectic, or unitary Grassmannian X is 2-incompressible if and only if the varieties XF (Y ) and YF (X) are so. Some new properties of incompressible Grassmannians are established on the way.
منابع مشابه
Incompressible Grassmannians of Isotropic Subspaces
We study 2-incompressible Grassmannians of isotropic subspaces of a quadratic form, of a hermitian form over a quadratic extension of the base field, and of a hermitian form over a quaternion algebra.
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تاریخ انتشار 2014