Xavier Povill

dblp:433/3532 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2026
—ORCID · unresolved

Domains — the database's venue-derived domains; a paper can count in several

Theory of computation · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Theoretical computer science
1 paper
Graph algorithms and graph theory · 61% Algorithms and data structures · 30% Combinatorics and discrete mathematics · 9%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Graph algorithms and graph theory › graph coloring
equitable coloring
1.012026
Sampling Colorings with Fixed Color Class Sizes · ICALP 2026
Graph algorithms and graph theory
graph coloring
1.012026
Sampling Colorings with Fixed Color Class Sizes · ICALP 2026
Algorithms and data structures › randomized algorithms
sampling
1.012026
Sampling Colorings with Fixed Color Class Sizes · ICALP 2026
Combinatorics and discrete mathematics
probabilistic combinatorics
0.312026
Sampling Colorings with Fixed Color Class Sizes · ICALP 2026

Methods — techniques the papers use, named apart from their topics

markov chain monte carlo · 1.0local central limit theorem · 1.0geometry of polynomials · 1.0
YearPublicationVenuePosition
2026 Sampling Colorings with Fixed Color Class Sizes
abstract
In 1970, Hajnal and Szemerédi proved a conjecture of Erdős stating that any graph with maximum degree Δ admits an equitable (Δ+1)-coloring, that is, a coloring where color class sizes differ by at most 1. In 2007 Kierstead and Kostochka reproved their result and provided a polynomial-time algorithm which produces such a coloring. In this paper we study the problem of approximately sampling uniformly random equitable colorings. A series of works gives polynomial-time sampling algorithms for colorings without the color class constraint, the latest improvement being by Carlson and Vigoda for q ≥ 1.809 Δ. In this paper we give a polynomial-time sampling algorithm for equitable colorings when q > 2Δ. Moreover, our results extend to colorings with small deviations from equitable (and as a corollary, establishing their existence). The proof uses the framework of the geometry of polynomials for multivariate polynomials, and as a consequence establishes a multivariate local Central Limit Theorem for color class sizes of uniform random colorings.
Aiya Kuchukova, Will Perkins 0001, Xavier Povill
ICALP3