Affine k-dimensional intersection conjecture

Prove that, for degree-d polynomial spaces W of dimension r in m affine variables whose common zero set has dimension at most k, the maximum number e^A_r(d,m,k;q) of rational points equals the explicitly defined quantity f^A_r(d,m,k;q) for 0 ≤ k ≤ m−1, m−k ≤ r ≤ \binom{m+d}{d}, and q ≥ d+1.

Background

The affine quantity eA_r(d,m,k;q) maximizes the number of rational points in the common zero set of an r-dimensional space of affine polynomials of degree at most d, subject to the geometric-dimension constraint dim Z(W) ≤ k. The proposed expression fA_r(d,m,k;q) is defined through lexicographic ordering of exponent vectors in a bounded monomial box with d-bounds in m−k coordinates and q-bounds in the remaining k coordinates.

The paper constructs examples attaining fA_r(d,m,k;q), thereby proving it is a lower bound for eA_r(d,m,k;q). It also notes that the complete-intersection case r=m−k is known, while the general equality remains conjectural.

References

We conjecture the following.

A $k$-Dimensional Version of the Largest Intersection Problem  (2608.17771 - Lin, 18 Aug 2026) in Conjecture (Affine conjecture), Section 1, subsection "k-dimensional conjecture"

We also state a related conjecture about standard graded Artinian algebras, and we will later discuss why this conjecture motivates the previous ones.

A $k$-Dimensional Version of the Largest Intersection Problem  (2608.17771 - Lin, 18 Aug 2026) in Conjecture (Affine Algebraic Conjecture), Section 1