Existence conjecture for convex weak refractors with general target sets

Let TT be a target set satisfying Hypothesis H1, and let

K=maxxTxminxTx.K=\frac{\max_{x\in T}|x|}{\min_{x\in T}|x|}.

Suppose that ϵ0<limtK+1t1\epsilon_0<\lim_{t\to K^+}\frac{1}{t-1}, where ϵ0\epsilon_0 is defined by the source's equation (e0). Given γ>0\gamma>0 with

ϵ0+γ<limtK+1t1,\epsilon_0+\gamma<\lim_{t\to K^+}\frac{1}{t-1},

set δγ=1/(ϵ0+γ)\delta_\gamma=1/(\epsilon_0+\gamma). Let gL1(S2)g\in L^1(\mathbb{S}^2) be nonnegative and vanish outside DTδγD_T^{\delta_\gamma}, and let fL1(T)f\in L^1(T) be nonnegative. If FF is the measure defined by the source's equation (lebesgue) and

F(T)=μg(DTδγ),F(T)=\mu_g(D_T^{\delta_\gamma}),

then there exists ϵM(ϵ0+γ,limtK+1/(t1))\epsilon_M\in(\epsilon_0+\gamma,\lim_{t\to K^+}1/(t-1)) and a convex refractor RRconvexϵM(T)R\in\mathcal{R}_{\mathrm{convex}}^{\epsilon_M}(T) that is a convex weak solution to the refractor problem.

Convex refractor existence conjecture. Under these hypotheses, such a convex weak solution exists for the target set and data described above.

The conjecture would extend the paper's existence results beyond the rotationally symmetric and sufficiently close target-set cases, potentially covering general exotic Lebesgue-measurable target sets. The source provides indirect evidence from its established existence theorems, but does not state that this general claim has been proved.

Sources & referencesView supporting material

Primary source

Dylanger Pittman, “Convex Solutions to the Virtual Source Reflector Problem”, arXiv:2301.02106 (2023).

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