English

Singularity of sparse Bernoulli matrices

Probability 2020-04-08 v1

Abstract

Let MnM_n be an n×nn\times n random matrix with i.i.d. Bernoulli(p) entries. We show that there is a universal constant C1C\geq 1 such that, whenever pp and nn satisfy Clogn/npC1C\log n/n\leq p\leq C^{-1}, \begin{align*} {\mathbb P}\big\{\mbox{MnM_n is singular}\big\}&=(1+o_n(1)){\mathbb P}\big\{\mbox{MnM_n contains a zero row or column}\big\}\\ &=(2+o_n(1))n\,(1-p)^n, \end{align*} where on(1)o_n(1) denotes a quantity which converges to zero as nn\to\infty. We provide the corresponding upper and lower bounds on the smallest singular value of MnM_n as well.

Keywords

Cite

@article{arxiv.2004.03131,
  title  = {Singularity of sparse Bernoulli matrices},
  author = {Alexander E. Litvak and Konstantin E. Tikhomirov},
  journal= {arXiv preprint arXiv:2004.03131},
  year   = {2020}
}
R2 v1 2026-06-23T14:42:12.778Z