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Đề tài "Gr¨obner geometry of Schubert polynomials "

Chia sẻ: Nguyen Nhi | Ngày: | Loại File: PDF | Số trang:75

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Given a permutation w ∈ Sn , we consider a determinantal ideal Iw whose generators are certain minors in the generic n × n matrix (filled with independent variables). Using ‘multidegrees’ as simple algebraic substitutes for torus-equivariant cohomology classes on vector spaces, our main theorems describe, for each ideal Iw : • variously graded multidegrees and Hilbert series in terms of ordinary and double Schubert and Grothendieck polynomials;

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