Towards optimal lower bounds for k-median and k-means coresets
V Cohen-Addad, KG Larsen, D Saulpic… - Proceedings of the 54th …, 2022 - dl.acm.org
The (k, z)-clustering problem consists of finding a set of k points called centers, such that the
sum of distances raised to the power of z of every data point to its closest center is …
sum of distances raised to the power of z of every data point to its closest center is …
Improved approximations for Euclidean k-means and k-median, via nested quasi-independent sets
Motivated by data analysis and machine learning applications, we consider the popular high-
dimensional Euclidean k-median and k-means problems. We propose a new primal-dual …
dimensional Euclidean k-median and k-means problems. We propose a new primal-dual …
A survey on approximation in parameterized complexity: Hardness and algorithms
Parameterization and approximation are two popular ways of coping with NP-hard
problems. More recently, the two have also been combined to derive many interesting …
problems. More recently, the two have also been combined to derive many interesting …
Differentially private clustering: Tight approximation ratios
We study the task of differentially private clustering. For several basic clustering problems,
including Euclidean DensestBall, 1-Cluster, k-means, and k-median, we give efficient …
including Euclidean DensestBall, 1-Cluster, k-means, and k-median, we give efficient …
Multi-swap k-means++
L Beretta, V Cohen-Addad… - Advances in Neural …, 2023 - proceedings.neurips.cc
Abstract The $ k $-means++ algorithm of Arthur and Vassilvitskii (SODA 2007) is often the
practitioners' choice algorithm for optimizing the popular $ k $-means clustering objective …
practitioners' choice algorithm for optimizing the popular $ k $-means clustering objective …
Learning-Augmented -means Clustering
$ k $-means clustering is a well-studied problem due to its wide applicability. Unfortunately,
there exist strong theoretical limits on the performance of any algorithm for the $ k $-means …
there exist strong theoretical limits on the performance of any algorithm for the $ k $-means …
Johnson Coverage Hypothesis: Inapproximability of k-means and k-median in ℓp-metrics
V Cohen-Addad, E Lee - Proceedings of the 2022 Annual ACM-SIAM …, 2022 - SIAM
k-median and k-means are the two most popular objectives for clustering algorithms.
Despite intensive effort, a good understanding of the approximability of these objectives …
Despite intensive effort, a good understanding of the approximability of these objectives …
On approximability of clustering problems without candidate centers
The k-means objective is arguably the most widely-used cost function for modeling
clustering tasks in a metric space. In practice and historically, k-means is thought of in a …
clustering tasks in a metric space. In practice and historically, k-means is thought of in a …
Breaching the 2 LMP Approximation Barrier for Facility Location with Applications to k-Median
The Uncapacitated Facility Location (UFL) problem is one of the most fundamental
clustering problems: Given a set of clients C and a set of facilities F in a metric space (C∪ F …
clustering problems: Given a set of clients C and a set of facilities F in a metric space (C∪ F …
FPT constant-approximations for capacitated clustering to minimize the sum of cluster radii
Clustering with capacity constraints is a fundamental problem that attracted significant
attention throughout the years. In this paper, we give the first FPT constant-factor …
attention throughout the years. In this paper, we give the first FPT constant-factor …