Positivity in the Grothendieck group of
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Michel Brion
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Article
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2002
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Elsevier Science
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English
β 199 KB
We prove a conjecture of A.S. Buch concerning the structure constants of the Grothendieck ring of a flag variety with respect to its basis of Schubert structure sheaves. For this, we show that the coefficients in this basis of the structure sheaf of any subvariety with rational singularities have al