activity
20182026
most citedA better bound for ordinary triangles

1 citations · 1 across the 14 of their papers we have counts for

collaborators

15 papers

math.CO2026

The -color poset Ramsey number of the diamond is

Tom Bohman, Will Cong, Quentin Dubroff +3

The -color Ramsey number of a poset is the smallest dimension such that any -coloring of the -dimensional Boolean lattice contains a monochromatic induced copy of…

math.PR2026

Online Permutation Embedding: Optimal Stopping and Scaling Laws

Dylan J. Altschuler, Quentin Dubroff, Konstantin Tikhomirov

We study optimal online algorithms for embedding a permutation of into an iid stream of uniform random variables. This problem is a broad generalization of the cl…

math.PR2026

Faster random walks via infrequent steering

Boris Bukh, Quentin Dubroff

Random walks on graphs can be slow. To speed them up, imagine that at each step instead of choosing the neighbor at random, there is a small probability that we can…

math.CO2026

Thresholds vs. expectation thresholds for non-spanning graphs

Quentin Dubroff

The threshold for the event that the binomial random graph contains a copy of a graph is the unique for which , an…

math.CO2025

On Minimum Cost Rainbow Structures

Patrick Bennett, Quentin Dubroff, Alan Frieze +1

We discuss the expected minimum cost of rainbow spanning trees and Hamilton cycles in randomly edge colored random graphs.

math.CO2025

On the "second" Kahn--Kalai Conjecture: cliques, cycles, and trees

Quentin Dubroff, Jeff Kahn, Jinyoung Park

We prove a few simple cases of a random graph statement that would imply the "second" Kahn--Kalai Conjecture. Even these cases turn out to be reasonably challenging, and it is hope…

math.CO2025

On the "second" Kahn--Kalai Conjecture

Quentin Dubroff, Jeff Kahn, Jinyoung Park

We make progress on a conjecture of Kahn and Kalai, the original (stronger but less general) version of what became known as the ``Kahn-Kalai Conjecture" (KKC; now a theorem of Par…

math.CO2024

Note on a conjecture of Talagrand: expectation thresholds vs. fractional expectation thresholds

Quentin Dubroff, Jeff Kahn, Jinyoung Park

We show that a restricted version of a conjecture of M. Talagrand on the relation between "expectation thresholds" and "fractional expectation thresholds" follows easily from a str…

math.CO2024

On the -space of a random graph

Quentin Dubroff, Jeff Kahn

The edge space of a graph is the vector space with members naturally identified with subgraphs of , and the -space is the subspace…

math.CO2023

Clique Supersaturation

Quentin Dubroff, Benjamin Gunby, Bhargav Narayanan +1

We study how many copies of a graph that another graph with a given number of cliques is guaranteed to have. For example, one of our main results states that for all $t\ge…

math.CO2022

A Counterexample to a Directed KKL Inequality

Quentin Dubroff, Shivam Nadimpalli, Bhargav Narayanan

We show that the natural directed analogues of the KKL theorem [KKL88] and the Eldan--Gross inequality [EG20] from the analysis of Boolean functions fail to hold. This is in contra…

math.CO2022

Reverse discrepancy and almost zero-sum stars

Quentin Dubroff

For chosen from the -valued functions on the edges of a hypergraph with , how large can one make $\min_{v \in V} |\sum_…

math.CO2022

Tower Gaps in Multicolour Ramsey Numbers

Quentin Dubroff, António Girão, Eoin Hurley +1

Resolving a problem of Conlon, Fox, and Rödl, we construct a family of hypergraphs with arbitrarily large tower height separation between their -colour and -colour Ramsey num…

math.PR2021

Linear cover time is exponentially unlikely

Quentin Dubroff, Jeff Kahn

Proving a 2009 conjecture of Itai Benjamini, we show: For any C there is an such that for any simple graph on of size , and an ordinary rand…

math.CO2018★ 1 cited

A better bound for ordinary triangles

Quentin Dubroff

Let be a finite set of points in the plane. A c-ordinary triangle is a set of three non-collinear points of such that each line spanned by the points contains at most p…