Parameterized Algorithms for Finding Square Roots
Data Structures and Algorithms
2013-10-22 v1
Abstract
We show that the following two problems are fixed-parameter tractable with parameter k: testing whether a connected n-vertex graph with m edges has a square root with at most n-1+k edges and testing whether such a graph has a square root with at least m-k edges. Our first result implies that squares of graphs obtained from trees by adding at most k edges can be recognized in polynomial time for every fixed k>=0; previously this result was known only for k=0. Our second result is equivalent to stating that deciding whether a graph can be modified into a square root of itself by at most k edge deletions is fixed-parameter tractable with parameter k.
Cite
@article{arxiv.1310.5469,
title = {Parameterized Algorithms for Finding Square Roots},
author = {Manfred Cochefert and Jean-François Couturier and Petr A. Golovach and Dieter Kratsch and Daniël Paulusma},
journal= {arXiv preprint arXiv:1310.5469},
year = {2013}
}