The generalized valuation conjecture for special sections and integral critical points

Let GG be a complex reductive group, let BB be a Borel subgroup, let w0w_0 be the longest Weyl-group element, and let i\mathbf{i} be a reduced expression of w0w_0. For a dominant weight λ\lambda, let pλZtλ(K>0)+p_\lambda\in Z_{t^\lambda}(\mathcal{K}_{>0})^+ be the critical point, and suppose that pλp_\lambda is integral, meaning that pλZ(C((t)))p_\lambda\in Z(\mathbb{C}((t))). Let ωλ1H0(G/B,Lλ)\omega_\lambda^{-1}\in H^0(G/B,\mathcal{L}_\lambda) be the corresponding special section, and let νλ,i\nu_{\lambda,\mathbf{i}} and νλ,i\nu^{\vee}_{\lambda,\mathbf{i}} be the maps to the string polytope associated with i\mathbf{i}. The generalized valuation conjecture. Given λ\lambda such that pλp_\lambda is integral, we have

νλ,i(ωλ1)=νλ,i(pλ)\nu_{\lambda,\mathbf{i}}(\omega_\lambda^{-1})=\nu^{\vee}_{\lambda,\mathbf{i}}(p_\lambda)

for all reduced expressions i\mathbf{i} of w0w_0. This generalizes the special case λ=2ρ\lambda=2\rho by relating the Newton–Okounkov valuation of each constructed special section to the tropical valuation of its integral critical point. The source gives no evidence that the conjecture has been proved or disproved.

Sources & referencesView supporting material

Primary source

Jamie Judd, “Tropical critical points of the superpotential of a flag variety”, arXiv:1606.06883 (2017).

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