In Borel unbalanced bipartite multigraphs there exists a Borel matching covering μ-almost every vertex in the higher-degree part for any Borel probability measure μ.
Borel Local Lemma: arbitrary random variables and limited exponential growth
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abstract
The Lov\'asz Local Lemma (the LLL for short) is a powerful tool in probabilistic combinatorics that is used to verify the existence of combinatorial objects with desirable properties. Recent years saw the development of various "constructive" versions of the LLL. A major success of this research direction is the Borel version of the LLL due to Cs\'oka, Grabowski, M\'ath\'e, Pikhurko, and Tyros, which holds under a subexponential growth assumption. A drawback of their approach is that it only applies when the underlying random variables take values in a finite set. We present an alternative proof of a Borel version of the LLL that holds even if the underlying random variables are continuous and applies to dependency graphs of limited exponential growth.
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2026 1verdicts
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Measurable matchings in unbalanced graphs
In Borel unbalanced bipartite multigraphs there exists a Borel matching covering μ-almost every vertex in the higher-degree part for any Borel probability measure μ.