The Frobenius-manifold Lyashko–Looijenga degree conjecture

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Let WW be an irreducible real reflection group, let gg be a quasi-Coxeter element in WW, and assume that the Frobenius manifold Fg\mathcal{F}_g exists. Let LL(Fg)LL(\mathcal{F}_g) denote its Lyashko–Looijenga map, and let FWred(g)F_W^{\mathrm{red}}(g) be the number of reduced reflection factorizations of gg.

Frobenius-manifold Lyashko–Looijenga degree conjecture. The degree of the map LL(Fg)LL(\mathcal{F}_g) equals

FWred(g).F_W^{\mathrm{red}}(g).

For Coxeter elements, the analogous equality is known and relates reduced reflection factorizations to the degree of a weighted-homogeneous Lyashko–Looijenga map. The conjecture extends this relationship to quasi-Coxeter elements when the corresponding Frobenius manifold exists; the source gives no resolution status.

References

Primary source

Theo Douvropoulos, Joel Brewster Lewis and Alejandro H. Morales, “Hurwitz numbers for reflection groups II: Parabolic quasi-Coxeter elements”, arXiv:2209.00066 (2022).

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