# Coresets Meet EDCS: Algorithms for Matching and Vertex Cover on Massive Graphs

arXiv: https://arxiv.org/abs/1711.03076 · HTML: https://mlsanity.com/paper/1711.03076/

## Key facts

- Cited by 4 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 8 Nov 2017.

## Built on by (most cited first, 4 of 4)

- [Dataset Distillation by Automatic Training Trajectories](https://mlsanity.com/paper/2407.14245/) (2024)
- [New Coresets for Projective Clustering and Applications](https://mlsanity.com/paper/2203.04370/) (2022)
- [One Pass Streaming Algorithm for Super Long Token Attention Approximation in Sublinear Space](https://mlsanity.com/paper/2311.14652/) (2023)
- [No Dimensional Sampling Coresets for Classification](https://mlsanity.com/paper/2402.05280/) (2024)

## Abstract (arXiv)

As massive graphs become more prevalent, there is a rapidly growing need for scalable algorithms that solve classical graph problems, such as maximum matching and minimum vertex cover, on large datasets. For massive inputs, several different computational models have been introduced, including the streaming model, the distributed communication model, and the massively parallel computation (MPC) model that is a common abstraction of MapReduce-style computation. In each model, algorithms are analyzed in terms of resources such as space used or rounds of communication needed, in addition to the more traditional approximation ratio. In this paper, we give a single unified approach that yields better approximation algorithms for matching and vertex cover in all these models. The highlights include: * The first one pass, significantly-better-than-2-approximation for matching in random arrival streams that uses subquadratic space, namely a (1.5+ε)-approximation streaming algorithm that uses O(n1.5) space for constant ε > 0. * The first 2-round, better-than-2-approximation for matching in the MPC model that uses subquadratic space per machine, namely a (1.5+ε)-approximation algorithm with O(√mn + n) memory per machine for constant ε > 0. By building on our unified approach, we further develop parallel algorithms in the MPC model that give a (1 + ε)-approximation to matching and an O(1)-approximation to vertex cover in only O(loglogn) MPC rounds and O(n/polylog(n)) memory per machine. These results settle multiple open questions posed in the recent paper of Czumaj~et.al. [STOC 2018].