Toric Specht module decomposition conjecture

Let κ=λ/d/μ\kappa=\lambda/d/\mu be a toric shape, let SκS^\kappa be its toric Specht module, and let SνS^\nu denote the irreducible representation of the symmetric group indexed by νPkn\nu\in P_{kn}. Let Cμνλ,dC_{\mu\nu}^{\lambda,d} be the corresponding Gromov–Witten invariants. Toric Specht module conjecture. The coefficients of the irreducible components in Sλ/d/μS^{\lambda/d/\mu} are the Gromov–Witten invariants, namely

Sλ/d/μ=νPknCμνλ,dSν.S^{\lambda/d/\mu}=\bigoplus_{\nu\in P_{kn}} C_{\mu\nu}^{\lambda,d}\,S^\nu.

This proposes a representation-theoretic, subtraction-free interpretation of the Gromov–Witten invariants and would give a decomposition rule for toric Specht modules analogous to the usual irreducible Specht-module theory. The source presents it as an open conjecture.

Sources & referencesView supporting material

Primary source

Alexander Postnikov, “Affine approach to quantum Schubert calculus”, arXiv:math/0205165 (2002).

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