Fässler–Orponen restricted Marstrand conjecture for space curves

At least 3 years old · documented by

Let I⊂RI\subset\mathbb{R} be a compact interval, and let γ:I→S2\gamma:I\to S^2 be a C2C^2 curve satisfying the escaping great circle condition

span⁡γ(θ),γ˙(θ),γ¨(θ)=R3\operatorname{span}\\{\gamma(\theta),\dot\gamma(\theta),\ddot\gamma(\theta)\\}=\mathbb{R}^3

for every θ∈I\theta\in I. Let Z⊂R3Z\subset\mathbb{R}^3 be analytic. Fässler–Orponen's conjecture. For almost every θ∈I\theta\in I,

dim (γ(θ)⋅Z)=min⁡(dim Z,1).\mathrm{dim}\,(\gamma(\theta)\cdot Z)=\min(\mathrm{dim}\, Z,1).

This is a restricted Marstrand-type projection statement for directions lying on a space curve that does not remain in any great circle to second order. The paper's abstract says that this conjecture is resolved, but the supplied excerpt does not state whether the result proves or disproves it.

References

Primary source

Malabika Pramanik, Tongou Yang and Joshua Zahl, “A Furstenberg-type problem for circles, and a Kaufman-type restricted projection theorem in R^3”, arXiv:2207.02259 (2024).

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.