English

A Subquadratic Time Algorithm for the Weighted $k$-Center Problem on Cactus Graphs

Data Structures and Algorithms 2023-03-31 v1 Computational Geometry

Abstract

The weighted kk-center problem in graphs is a classical facility location problem where we place kk centers on the graph, which minimize the maximum weighted distance of a vertex to its nearest center. We study this problem when the underlying graph is a cactus with nn vertices and present an O(nlog2n)O(n \log^2 n) time algorithm for the same. This time complexity improves upon the O(n2)O(n^2) time algorithm by Ben-Moshe et al. [TCS 2007], which is the current state-of-the-art.

Keywords

Cite

@article{arxiv.2303.17204,
  title  = {A Subquadratic Time Algorithm for the Weighted $k$-Center Problem on Cactus Graphs},
  author = {Binay Bhattacharya and Sandip Das and Subhadeep Ranjan Dev},
  journal= {arXiv preprint arXiv:2303.17204},
  year   = {2023}
}

Comments

Submitted to Theoretical Computer Science

R2 v1 2026-06-28T09:40:58.274Z