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Many randomized algorithms can be derandomized efficiently using either the method of conditional expectations or probability spaces with low (almost-) independence. A series of papers, beginning with Luby (1993) and continuing with Berger…

数据结构与算法 · 计算机科学 2023-10-13 David G. Harris

The resampling algorithm of Moser \& Tardos is a powerful approach to develop constructive versions of the Lov\'{a}sz Local Lemma (LLL). We generalize this to partial resampling: when a bad event holds, we resample an appropriately-random…

组合数学 · 数学 2023-10-13 David G. Harris , Aravind Srinivasan

The famous Lovasz Local Lemma [EL75] is a powerful tool to non-constructively prove the existence of combinatorial objects meeting a prescribed collection of criteria. Kratochvil et al. applied this technique to prove that a k-CNF in which…

数据结构与算法 · 计算机科学 2008-09-15 Robin A. Moser

We consider the task of designing Local Computation Algorithms (LCA) for applications of the Lov\'{a}sz Local Lemma (LLL). LCA is a class of sublinear algorithms proposed by Rubinfeld et al.~\cite{Ronitt} that have received a lot of…

数据结构与算法 · 计算机科学 2020-07-08 Dimitris Achlioptas , Themis Gouleakis , Fotis Iliopoulos

We consider the recent formulation of the Algorithmic Lov\'asz Local Lemma [10,2,3] for finding objects that avoid `bad features', or `flaws'. It extends the Moser-Tardos resampling algorithm [17] to more general discrete spaces. At each…

数据结构与算法 · 计算机科学 2018-09-05 Vladimir Kolmogorov

We develop tools for analyzing focused stochastic local search algorithms. These are algorithms which search a state space probabilistically by repeatedly selecting a constraint that is violated in the current state and moving to a random…

离散数学 · 计算机科学 2015-08-18 Dimitris Achlioptas , Fotis Iliopoulos

Following the groundbreaking Moser-Tardos algorithm for the Lovasz Local Lemma (LLL), a series of works have exploited a key ingredient of the original analysis, the witness tree lemma, in order to: derive deterministic, parallel and…

离散数学 · 计算机科学 2019-06-11 Fotis Iliopoulos

The Lovasz Local Lemma (LLL) is a probabilistic tool which has been used to show the existence of a variety of combinatorial structures with good "local" properties. The "LLL-distribution" can be used to show that the resulting structures…

组合数学 · 数学 2023-10-13 David G. Harris

The Lov\'{a}sz Local Lemma (LLL) is a powerful tool in probabilistic combinatorics which can be used to establish the existence of objects that satisfy certain properties. The breakthrough paper of Moser and Tardos and follow-up works…

数据结构与算法 · 计算机科学 2025-09-09 David G. Harris , Fotis Iliopoulos , Vladimir Kolmogorov

The Lov\'{a}sz Local Lemma is a very powerful tool in probabilistic combinatorics, that is often used to prove existence of combinatorial objects satisfying certain constraints. Moser and Tardos have shown that the LLL gives more than just…

组合数学 · 数学 2019-09-13 Anton Bernshteyn

Recently, Brandt, Maus and Uitto [PODC'19] showed that, in a restricted setting, the dependency of the complexity of the distributed Lov\'asz Local Lemma (LLL) on the chosen LLL criterion exhibits a sharp threshold phenomenon: They proved…

数据结构与算法 · 计算机科学 2020-06-09 Sebastian Brandt , Christoph Grunau , Václav Rozhoň

Shearer gave a general theorem characterizing the family $\LLL$ of dependency graphs labeled with probabilities $p_v$ which have the property that for any family of events with a dependency graph from $\LLL$ (whose vertex-labels are upper…

组合数学 · 数学 2012-04-27 Wesley Pegden

We present a poly $\log \log n$ time randomized CONGEST algorithm for a natural class of Lovasz Local Lemma (LLL) instances on constant degree graphs. This implies, among other things, that there are no LCL problems with randomized…

分布式、并行与集群计算 · 计算机科学 2021-08-06 Yannic Maus , Jara Uitto

The Lov\'asz Local Lemma (LLL) is a very powerful tool in combinatorics and probability theory to show the possibility of avoiding all bad events under some weakly dependent conditions. In a seminal paper, Ambainis, Kempe, and Sattath (JACM…

计算复杂性 · 计算机科学 2024-09-30 Kun He , Qian Li , Xiaoming Sun , Jiapeng Zhang

We illustrate the use of probability theory in existential proofs, focusing on the Lov\'asz Local Lemma. This result gives a lower bound for the probability of avoiding a suitable finite collection of events. We describe some applications…

组合数学 · 数学 2019-09-25 Irfan Alam

Following the groundbreaking algorithm of Moser and Tardos for the Lovasz Local Lemma (LLL), there has been a plethora of results analyzing local search algorithms for various constraint satisfaction problems. The algorithms considered fall…

离散数学 · 计算机科学 2020-08-20 Dimitris Achlioptas , Fotis Iliopoulos , Alistair Sinclair

The Lov\'{a}sz Local Lemma is a very powerful tool in probabilistic combinatorics, that is often used to prove existence of combinatorial objects satisfying certain constraints. Moser and Tardos have shown that the LLL gives more than just…

组合数学 · 数学 2017-05-08 Anton Bernshteyn

The Lovasz Local Lemma (LLL) is a powerful tool in probability theory to show the existence of combinatorial objects meeting a prescribed collection of "weakly dependent" criteria. We show that the LLL extends to a much more general…

量子物理 · 物理学 2013-10-10 Andris Ambainis , Julia Kempe , Or Sattath

We consider recent formulations of the algorithmic Lovasz Local Lemma by Achlioptas-Iliopoulos-Kolmogorov [2] and by Achlioptas-Iliopoulos-Sinclair [3]. These papers analyze a random walk algorithm for finding objects that avoid undesired…

数据结构与算法 · 计算机科学 2020-08-17 Vladimir Kolmogorov

The Lov\'asz Local Lemma is a seminal result in probabilistic combinatorics. It gives a sufficient condition on a probability space and a collection of events for the existence of an outcome that simultaneously avoids all of those events.…

组合数学 · 数学 2017-11-21 Nicholas J. A. Harvey , Jan Vondrák