Online scheduling via learned weights

S Lattanzi, T Lavastida, B Moseley… - Proceedings of the …, 2020 - SIAM
Online algorithms are a hallmark of worst case optimization under uncertainty. On the other
hand, in practice, the input is often far from worst case, and has some predictable …

Polylogarithmic-time deterministic network decomposition and distributed derandomization

V Rozhoň, M Ghaffari - Proceedings of the 52nd Annual ACM SIGACT …, 2020 - dl.acm.org
We present a simple polylogarithmic-time deterministic distributed algorithm for network
decomposition. This improves on a celebrated 2 O (√ log n)-time algorithm of Panconesi …

The locality of distributed symmetry breaking

L Barenboim, M Elkin, S Pettie… - Journal of the ACM (JACM), 2016 - dl.acm.org
Symmetry-breaking problems are among the most well studied in the field of distributed
computing and yet the most fundamental questions about their complexity remain open. In …

Improved deterministic network decomposition

M Ghaffari, C Grunau, V Rozhoň - Proceedings of the 2021 ACM-SIAM …, 2021 - SIAM
Network decomposition is a central tool in distributed graph algorithms. We present two
improvements on the state of the art for network decomposition, which thus lead to …

An exponential separation between randomized and deterministic complexity in the LOCAL model

YJ Chang, T Kopelowitz, S Pettie - SIAM Journal on Computing, 2019 - SIAM
Over the past 30 years numerous algorithms have been designed for symmetry breaking
problems in the LOCAL model, such as maximal matching, MIS, vertex coloring, and edge …

Improved massively parallel computation algorithms for mis, matching, and vertex cover

M Ghaffari, T Gouleakis, C Konrad, S Mitrović… - Proceedings of the …, 2018 - dl.acm.org
We present O (loglog n)-round algorithms in the Massively Parallel Computation (MPC)
model, with Õ (n) memory per machine, that compute a maximal independent set, a 1+ ε …

Lower bounds for maximal matchings and maximal independent sets

A Balliu, S Brandt, J Hirvonen, D Olivetti… - Journal of the ACM …, 2021 - dl.acm.org
There are distributed graph algorithms for finding maximal matchings and maximal
independent sets in O (Δ+ log* n) communication rounds; here, n is the number of nodes …

On derandomizing local distributed algorithms

M Ghaffari, DG Harris, F Kuhn - 2018 IEEE 59th Annual …, 2018 - ieeexplore.ieee.org
The gap between the known randomized and deterministic local distributed algorithms
underlies arguably the most fundamental and central open question in distributed graph …

On the complexity of local distributed graph problems

M Ghaffari, F Kuhn, Y Maus - Proceedings of the 49th Annual ACM …, 2017 - dl.acm.org
This paper is centered on the complexity of graph problems in the well-studied LOCAL
model of distributed computing, introduced by Linial [FOCS'87]. It is widely known that for …

A lower bound for the distributed Lovász local lemma

S Brandt, O Fischer, J Hirvonen, B Keller… - Proceedings of the forty …, 2016 - dl.acm.org
We show that any randomised Monte Carlo distributed algorithm for the Lovász local lemma
requires Omega (log log n) communication rounds, assuming that it finds a correct …