The local obstruction conjecture for Bernoulli matrix singularity

Let Bn(p)B_n(p) be an n×nn\times n random matrix with independent and identically distributed Bernoulli entries of mean pp, and let qn(p)=P[Bn(p) is singular]q_n(p)=\mathbb{P}[B_n(p)\text{ is singular}]. Local obstruction conjecture. For fixed p(0,1)p\in(0,1),

qn(p)=(1+on(1))P[Bn(p) has two equal rows, two equal columns, a zero row, or a zero column].q_n(p)=(1+o_n(1))\mathbb{P}[B_n(p)\emph{ has two equal rows, two equal columns, a zero row, or a zero column}].

The conjecture asserts that singularity is asymptotically caused by these elementary local obstructions. The paper presents it as a natural extension of a folklore conjecture and notes that the available result of Tikhomirov does not determine the required sharp error term.

Sources & referencesView supporting material

Primary source

Vishesh Jain, Ashwin Sah and Mehtaab Sawhney, “Sharp invertibility of random Bernoulli matrices”, arXiv:2010.06553 (2021).

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