Pantone's algebraicity conjecture for inversion sequences avoiding 010 and 102

Let I(010,102)\mathcal{I}(010,102) be the class of inversion sequences avoiding the patterns 010010 and 102102, and let F(x)F(x) be its ordinary generating function. Pantone's algebraicity conjecture. The generating function FF is algebraic, with minimal polynomial

x(x2x+1)(x1)2F(x)3+2x(x1)(2x22x+1)F(x)2(x48x3+11x26x+1)F(x)(2x1)(x1)2.x(x^2-x+1)(x-1)^2F(x)^3+2x(x-1)(2x^2-2x+1)F(x)^2-(x^4-8x^3+11x^2-6x+1)F(x)-(2x-1)(x-1)^2.

The paper presents this as another conjecture of Pantone; the supplied text gives no resolution, so its status remains open.

Sources & referencesView supporting material

Primary source

Benjamin Testart, “Completing the enumeration of inversion sequences avoiding one or two patterns of length 3”, arXiv:2407.07701 (2025).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.