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Fast ultrametric matrix-vector multiplication

Numerical Analysis 2022-01-04 v1 Numerical Analysis

Abstract

We study the properties of ultrametric matrices aiming to design methods for fast ultrametric matrix-vector multiplication. We show how to encode such a matrix as a tree structure in quadratic time and demonstrate how to use the resulting representation to perform matrix-vector multiplications in linear time. Accompanying this article, we provide an implementation of the proposed algorithms and present empirical results on their practical performance.

Keywords

Cite

@article{arxiv.2201.00017,
  title  = {Fast ultrametric matrix-vector multiplication},
  author = {Tobias Hofmann and Andy Oertel},
  journal= {arXiv preprint arXiv:2201.00017},
  year   = {2022}
}
R2 v1 2026-06-24T08:37:09.424Z