The Fourier-dimension conjecture for cones and cylinders generated by arbitrary sets

Let AiRdA i\mathbb{R}^{d} be a set with Fourier dimension dimF(A)=sd\dim_F(A)=s\leq d. Define the cone and cylinder generated by AA by

CA={h(x,1)xA,hR}Rd+1,C_A=\{h(x,1)\mid x\in A, h\in\mathbb{R}\}\subset\mathbb{R}^{d+1},

and

DA={(x,h)xA,hR}Rd+1.D_A=\{(x,h)\mid x\in A, h\in\mathbb{R}\}\subset\mathbb{R}^{d+1}.

Cone-and-cylinder Fourier-dimension conjecture. Then

dimF(CA)=dimF(DA)=dimF(A)=s.\dim_F(C_A)=\dim_F(D_A)=\dim_F(A)=s.

This question asks whether passing from an arbitrary set to the cone or cylinder it generates preserves Fourier dimension. The supplied text does not state whether the claim has been resolved.

Sources & referencesView supporting material

Primary source

Junjie Zhu, “Fourier dimension of conical and cylindrical hypersurfaces”, arXiv:2401.01455 (2024).

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