Connected four-reflection approximation conjecture for random reflectors

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Let MnM_n be sets of mirrors and let Λ\Lambda denote the measure on light rays. The sets MnM_n are required to satisfy the conclusions of Theorem 16.2 except condition (b), namely the exceptional-set condition concerning rays that reflect exactly twice before returning to L∗L_*. Connected four-reflection approximation conjecture. One can construct sets MnM_n so that they satisfy Theorem 16.2 except for (b), are connected, and every light ray reflects from MnM_n four times, except for a set of rays of Λ\Lambda-measure 1/n1/n. This would strengthen the approximation theorem by imposing connectedness while prescribing four reflections for almost every ray; the source presents it as an expected consequence of iterating the construction, but gives no proof or resolution.

References

Primary source

Omer Angel, Krzysztof Burdzy and Scott Sheffield, “Deterministic approximations of random reflectors”, arXiv:1203.0801 (2012).

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