A Murgnahan-Nakayama rule for Schubert polynomials
نویسنده
چکیده
We expose a rule for multiplying a general Schubert polynomial with a power sum polynomial in k variables. A signed sum over cyclic permutations replaces the signed sum over rim hooks in the classical Murgnahan– Nakayama rule. In the intersection theory of flag manifolds this computes all intersections of Schubert cycles with tautological classes coming from the Chern character. We also discuss extensions of this rule to small quantum cohomology. Résumé. Nous ècrivons une formule pour multiplier les polynômes de Schubert avec les sommes de Newton. Une somme signée de permutations cycliques remplace la somme signée de rubans dans la formule classique de MurgnahanNakayama. Nous obtenons donc des relations dans l’anneau de Chow de la variété de drapeaux. Nous discutons également des extensions de cette formule en cohomologie quantique.
منابع مشابه
Two Murnaghan-nakayama Rules in Schubert Calculus
The Murnaghan-Nakayama rule expresses the product of a Schur function with a Newton power sum in the basis of Schur functions. We establish a version of the Murnaghan-Nakayama rule for Schubert polynomials and a version for the quantum cohomology ring of the Grassmannian. These rules compute all intersections of Schubert cycles with tautological classes coming from the Chern character. Like the...
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