The planar finite-field Furstenberg set lower-bound conjecture
Fix and . Let be an -set over , meaning that is a union of subsets over a family of affine -planes containing at least a constant multiple of planes, with each containing at least a constant multiple of points. Finite-field Furstenberg lower-bound conjecture. For every ,
\\#E\gtrsim_{\varepsilon}p^{\min\left\{s+t,\frac{3}{2}s+\frac{1}{2}t,s+1\right\}-\varepsilon}.This conjectured lower bound is motivated by the Ren–Wang result and concerns the optimal exponent in the planar finite-field Furstenberg set problem. The supplied text does not state whether the conjecture has been proved or disproved.
References
Primary source
Shengwen Gan, “Furstenberg set problem and exceptional set estimate in prime fields: dimension two implies higher dimensions”, arXiv:2409.11637 (2025).
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