Colorful Tverberg conjecture for regression depth

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Let r,dr,d be positive integers, and let A1,…,Ad+1A_1,\dots,A_{d+1} be sets of rr hyperplanes each in Rd\mathbb{R}^d. A partition of their union into rr sets B1,…,BrB_1,\dots,B_r is colorful Tverberg conjecture for regression depth. required such that

∣Ai∩Bj∣=1|A_i\cap B_j|=1

for every i∈[d+1]i\in[d+1] and j∈[r]j\in[r], together with a point qq having positive regression depth for each BjB_j. The conjecture would provide a colorful analogue of Tverberg's theorem for regression depth. However, this conjecture and its natural extensions to Rd\mathbb{R}^d have been disproved.

References

Primary source

Patrick Schnider and Pablo Soberón, “Combinatorial Depth Measures for Hyperplane Arrangements”, arXiv:2302.07768 (2023).

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