Gorsky–Oblomkov–Rasmussen filtration conjecture for rational Cherednik representations

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Let m,nm,n be coprime positive integers, let h\mathfrak{h} be the (n1)(n-1)-dimensional standard representation of SnS_n, and let Lmn\mathrm{L}_{\frac{m}{n}} be the unique finite-dimensional irreducible representation of the rational Cherednik algebra Hmn\mathrm{H}_{\frac{m}{n}}. Write Tm,nT_{m,n} for the (m,n)(m,n) torus knot and let HHH(Tm,n)\mathrm{H}\mathrm{H}\mathrm{H}(T_{m,n}) denote its triply graded Khovanov–Rozansky homology. The hook-isotypic components are HomSn(i(h),Lmn)\operatorname{Hom}_{S_n}(\wedge^i(\mathfrak{h}),\mathrm{L}_{\frac{m}{n}}). Gorsky–Oblomkov–Rasmussen conjecture. There exists a filtration on Lmn\mathrm{L}_{\frac{m}{n}} whose associated tt-grading refines the HOMFLY identity to

cha,q,t(HHH(Tm,n))=a(n1)(m1)i=0n1a2ichq,t(HomSn(i(h),Lmn)).\mathrm{ch}_{a,q,t}(\mathrm{H}\mathrm{H}\mathrm{H}(T_{m,n}))=a^{(n-1)(m-1)}\sum_{i=0}^{n-1}a^{2i}\mathrm{ch}_{q,t}\bigl(\operatorname{Hom}_{S_n}(\wedge^i(\mathfrak{h}),\mathrm{L}_{\frac{m}{n}})\bigr).

The conjecture proposes a representation-theoretic realization of the third homological grading of torus-knot Khovanov–Rozansky homology; the supplied text gives no resolution status.

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Sources & referencesView supporting material

Primary source

Xinchun Ma, “Rational Cherednik Algebras and Torus Knot Invariants”, arXiv:2402.18770 (2024).

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