Near-optimal massively parallel graph connectivity

S Behnezhad, L Dhulipala, H Esfandiari… - 2019 IEEE 60th …, 2019 - ieeexplore.ieee.org
Identifying the connected components of a graph, apart from being a fundamental problem
with countless applications, is a key primitive for many other algorithms. In this paper, we …

Weighted matchings via unweighted augmentations

B Gamlath, S Kale, S Mitrovic, O Svensson - Proceedings of the 2019 …, 2019 - dl.acm.org
We design a generic method to reduce the task of finding weighted matchings to that of
finding short augmenting paths in unweighted graphs. This method enables us to provide …

Transformers, parallel computation, and logarithmic depth

C Sanford, D Hsu, M Telgarsky - arXiv preprint arXiv:2402.09268, 2024 - arxiv.org
We show that a constant number of self-attention layers can efficiently simulate, and be
simulated by, a constant number of communication rounds of Massively Parallel …

Exponentially faster massively parallel maximal matching

S Behnezhad, MT Hajiaghayi… - 2019 IEEE 60th Annual …, 2019 - ieeexplore.ieee.org
The study of approximate matching in the Massively Parallel Computations (MPC) model
has recently seen a burst of breakthroughs. Despite this progress, however, we still have a …

Conditional hardness results for massively parallel computation from distributed lower bounds

M Ghaffari, F Kuhn, J Uitto - 2019 IEEE 60th Annual Symposium …, 2019 - ieeexplore.ieee.org
We present the first conditional hardness results for massively parallel algorithms for some
central graph problems including (approximating) maximum matching, vertex cover …

Faster algorithms for edge connectivity via random 2-out contractions

M Ghaffari, K Nowicki, M Thorup - Proceedings of the Fourteenth Annual ACM …, 2020 - SIAM
We provide a simple new randomized contraction approach to the global minimum cut
problem for simple undirected graphs. The contractions exploit 2-out edge sampling from …

Massively parallel algorithms for finding well-connected components in sparse graphs

S Assadi, X Sun, O Weinstein - … of the 2019 ACM Symposium on …, 2019 - dl.acm.org
Massively parallel computation (MPC) algorithms for graph problems have witnessed a
resurgence of interest in recent years. Despite major progress for numerous graph problems …

Deterministic massively parallel connectivity

S Coy, A Czumaj - Proceedings of the 54th Annual ACM SIGACT …, 2022 - dl.acm.org
We consider the problem of designing fundamental graph algorithms on the model of
Massive Parallel Computation (MPC). The input to the problem is an undirected graph G …

Improved deterministic (Δ+ 1) coloring in low-space MPC

A Czumaj, P Davies, M Parter - … of the 2021 ACM Symposium on …, 2021 - dl.acm.org
We present a deterministic O (log log log n)-round low-space Massively Parallel
Computation (MPC) algorithm for the classical problem of (Δ+ 1)-coloring on n-vertex …

Graph sparsification for derandomizing massively parallel computation with low space

A Czumaj, P Davies, M Parter - ACM Transactions on Algorithms (TALG), 2021 - dl.acm.org
The Massively Parallel Computation (MPC) model is an emerging model that distills core
aspects of distributed and parallel computation, developed as a tool to solve combinatorial …