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Equations defining symmetric varieties and affine Grassmannians

Rocco Chiriví·Peter Littelmann·Andrea Maffei
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Abstract

Let $σ$ be a simple involution of an algebraic semisimple group $G$ and let $H$ be the subgroup of $G$ of points fixed by $σ$. If the restricted root system is of type $A$, $C$ or $BC$ and $G$ is simply connected or if the restricted root system is of type $B$ and $G$ is adjoint, then we describe a standard monomial theory and the equations for the coordinate ring $k[G/H]$ using the standard monomial theory and the Plücker relations of an appropriate (maybe infinite dimensional) Grassmann variety.

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BibTeXRIS

Rocco Chiriví, Peter Littelmann, Andrea Maffei. 2007-03-28. Equations defining symmetric varieties and affine Grassmannians. https://arxiv.org/abs/math/0703843

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