Colorful Tverberg conjecture for regression depth

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

AiBj=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.

Sources & referencesView supporting material

Primary source

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

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