Visibility Density Conjecture for polynomial lines of sight

From papers

Let F(x)Z[x]F(x)\in \mathbb{Z}[x] be a polynomial with positive leading coefficient. A lattice point (a,h)Z>0×Z>0(a,h)\in\mathbb{Z}_{>0}\times\mathbb{Z}_{>0} is visible along F(x)F(x) if there exists tQt\in\mathbb{Q} such that h=tF(a)h=tF(a) and aa is the smallest positive integer uu for which tF(u)tF(u) is a positive integer. Define the density of visible lattice points, when the limit exists, by

D(F)=limN#{(a,b)Z>02:max{a,b}N and (a,b) is visible along F(x)}N2.D(F)=\lim_{N\to\infty}\frac{\#\{(a,b)\in\mathbb{Z}_{>0}^2:\max\{a,b\}\leq N\text{ and }(a,b)\text{ is visible along }F(x)\}}{N^2}.

Visibility Density Conjecture. If F(x)Z[x]F(x)\in\mathbb{Z}[x] has at least two distinct roots, then the set of lattice points in Z>0×Z>0\mathbb{Z}_{>0}\times\mathbb{Z}_{>0} visible along F(x)F(x) has density 11; equivalently,

D(F)=1.D(F)=1.

This extends the conjecture of Chaubey and Pandey for polynomials passing through the origin. It predicts a sharp contrast with monomials, for which the visible-point density is less than 11, and asserts that almost all lattice points are visible when the polynomial has at least two distinct roots.

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Sources & referencesView supporting material

Primary source

Abraham Lobsenz and Tristan Phillips, “Lattice point visibility along powers of polynomials”, arXiv:2604.23050 (2026).

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