English

Block structure in boolean matrices of bounded factorization norm

Classical Analysis and ODEs 2025-07-16 v2

Abstract

A boolean matrix is blocky if its 11-entries form a collection of 1-monochromatic submatrices that are disjoint in both rows and columns. Blocky matrices are precisely the set of boolean matrices with γ2\gamma_2 factorization norm at most 11. Building on recent work by Balla, Hambardzumyan, and Tomon, we show that for any boolean matrix with γ2\gamma_2 norm at most λ\lambda, there exists a a collection of row- and column-disjoint 1-monochromatic submatrices that together cover a significant portion (at least a 1/22O(λ)1/2^{2^{O(\lambda)}} fraction) of its 11-entries.

Keywords

Cite

@article{arxiv.2507.00872,
  title  = {Block structure in boolean matrices of bounded factorization norm},
  author = {Marcel K. Goh and Hamed Hatami},
  journal= {arXiv preprint arXiv:2507.00872},
  year   = {2025}
}

Comments

14 pages

R2 v1 2026-07-01T03:41:49.011Z