Colorful quantitative volume Helly conjecture

Let F1,,F2d\mathcal{F}_1, \dots, \mathcal{F}_{2d} be finite families of convex sets in Rd\mathbb{R}^d. Assume that for any choice F1F1,,F2dF2dF_1 \in \mathcal{F}_1, \dots, F_{2d} \in \mathcal{F}_{2d}, the volume of the intersection

i[2d]Fi\bigcap\limits_{i \in [2d]} F_i

is at least 11. Colorful quantitative volume Helly conjecture. Then for some i[2d]i \in [2d], the intersection of all sets in the family Fi\mathcal{F}_i has volume at least CdC_d, for some strictly positive constant CdC_d depending only on the dimension dd. This is the open volumetric analogue of the colorful quantitative diameter Helly theorem; the expected lower bound is asserted only to depend positively on the dimension.

Sources & referencesView supporting material

Primary source

G. Ivanov and M. Naszodi, “Helly numbers for Quantitative Helly-type results”, arXiv:2409.15048 (2024).

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