Crucial–Lundqvist–Nevo lattice-path conjecture for two generic forms in an exterior algebra

From papers

Let VV be a kk-vector space of dimension nn, and let Λ(V)\Lambda(V) be its exterior algebra. Let ff and gg be generic forms in Λ(V)\Lambda(V). For each ss, let a(n,s)a(n,s) be the number of lattice paths inside the rectangle (n+22s)×(n+2)(n+2-2s)\times(n+2) from the bottom-left corner to the top-right corner, using steps

(x,y)(x+1,y+1)or(x,y)(x1,y+1).(x,y)\longmapsto(x+1,y+1)\quad\text{or}\quad(x,y)\longmapsto(x-1,y+1).

Crucial–Lundqvist–Nevo conjecture. The Hilbert series of Λ(V)/(f,g)\Lambda(V)/(f,g) is

1+a(n,1)t+a(n,2)t2++a(n,s)ts+.1+a(n,1)t+a(n,2)t^2+\cdots+a(n,s)t^s+\cdots.

The conjecture gives a combinatorial description of the Hilbert series for quotients of an exterior algebra by two generic forms. The source provides no resolution status.

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Sources & referencesView supporting material

Primary source

Ralf Fröberg and Samuel Lundqvist, “Extremal Hilbert series”, arXiv:1711.01232 (2017).

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