Year: 2026
Type: preprint
Abstract: We prove the Bárány--Kalai--Tverberg conjecture extending the affine version of Tverberg's theorem to simplicial balls and polytopes other than the simplex: For any affine map $ϕ: P\to \mathbb R^d$ from a convex polytope $P$ of dimension $N=(d+1)(r-1)$ with $r\geq 2$, there exist $r$ pairwise disjoint faces $F_1,\ldots,F_r\subset\partial P$ such that $ϕ(F_1)\cap\dots\capϕ(F_r)\neq\varnothing$. A similar statement holds for a simplicial ball $P$ with $ϕ$ assumed affine on all of its faces.
Source: arXiv (Cornell University)
Authors: Avvakumov, Sergey, Karasev, Roman
Language: English
Subfield: Discrete Mathematics and Combinatorics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7213203578