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  1. Home > Articles & Issues >
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  3. Genomic Tableaux and ...
Conference paper

Genomic Tableaux and Combinatorial $K$-Theory

Oliver Pechenik ORCID (1), Alexander Yong (1)
(1) Department of Mathematics [Urbana]
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Imported on
November 21, 2016
Published on
December 31, 2014
Last modified on
March 31, 2025
Volume
DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015)
Proceedings
DOI
10.46298/dmtcs.2482
License
Attribution 4.0 International (CC BY 4.0)
National Science Foundation
0838434
EMSW21-MCTP: Research Experience for Graduate Students
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628
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Genomic Tableaux and Combinatorial $K$-Theory

Oliver Pechenik ORCID (1), Alexander Yong (1)
(1) Department of Mathematics [Urbana]
Abstract
English
We introduce genomic tableaux, with applications to Schubert calculus. We report a combinatorial rule for structure coefficients in the torus-equivariant $K$-theory of Grassmannians for the basis of Schubert structure sheaves. This rule is positive in the sense of [Anderson-Griffeth-Miller ’11]. We thereby deduce an earlier conjecture of [Thomas-Yong ’13] for the coefficients. Moreover, our rule specializes to give a new Schubert calculus rule in the (non-equivariant) $K$-theory of Grassmannians. From this perspective, we also obtain a new rule for $K$-theoretic Schubert structure constants of maximal orthogonal Grassmannians, and give conjectural bounds on such constants for Lagrangian Grassmannians.
French
Nous introduisons la notion de tableau génomique, pour l’appliquer au calcul de Schubert. Nous énonçons une règle combinatoire pour les coefficients de structure de la $K$-théorie tore-équivariante des grassmanniennes, dans la base définie par les classes des faisceaux structuraux des variétés de Schubert. Cette règle est positive au sens de [Anderson-Griffeth-Miller ’11]. Nous en déduisons une conjecture de [Thomas-Yong ’13]. De plus, notre règle se spécialise en une règle nouvelle pour le calcul de Schubert dans la $K$-théorie (non équivariante) des grassmanniennes. Nous obtenons également une nouvelle règle pour les coefficients de structure de la $K$-théorie des grassmanniennes orthogonales maximales dans la base de Schubert, et nous conjecturons certaines bornes pour ces coefficients dans le cas des grassmanniennes lagrangiennes.
Keywords
  • [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM]
  • Schubert calculus
  • equivariant $K$-theory
  • Grassmannians
  • genomic tableaux
Cited by

Source: OpenCitations

  • Genomic tableaux

    arXiv (Cornell University)

    Authors : Oliver Pechenik ORCID, Alexander Yong ORCID

    Journal reference : Volume 45, 2016, pp. 649-685

    DOI : 10.1007/s10801-016-0720-8
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