@inproceedings{Brion1999OnOC, title={On Orbit Closures of Borel Subgroups in Spherical Varieties}, author={Michel Brion}, year={1999} }

- Published 1999

Let F be the flag variety of a complex semi-simple group G, let H be an algebraic subgroup of G acting on F with finitely many orbits, and let V be an H-orbit closure in F . Expanding the cohomology class of V in the basis of Schubert classes defines a union V0 of Schubert varieties in F with positive multiplicities. If G is simply-laced, we show that these… CONTINUE READING

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