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Polynomial-Time Approximation Schemes for Independent Packing Problems on Fractionally Tree-Independence-Number-Fragile Graphs

Authors Esther Galby, Andrea Munaro , Shizhou Yang

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Author Details

Esther Galby
  • Institute for Algorithms and Complexity, Technische Universität Hamburg, Germany
Andrea Munaro
  • Department of Mathematical, Physical and Computer Sciences, University of Parma, Italy
Shizhou Yang
  • School of Mathematics and Physics, Queen’s University Belfast, UK

Acknowledgements

We thank the anonymous reviewers for valuable comments.

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Esther Galby, Andrea Munaro, and Shizhou Yang. Polynomial-Time Approximation Schemes for Independent Packing Problems on Fractionally Tree-Independence-Number-Fragile Graphs. In 39th International Symposium on Computational Geometry (SoCG 2023). Leibniz International Proceedings in Informatics (LIPIcs), Volume 258, pp. 34:1-34:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)
https://doi.org/10.4230/LIPIcs.SoCG.2023.34

Abstract

We investigate a relaxation of the notion of treewidth-fragility, namely tree-independence-number-fragility. In particular, we obtain polynomial-time approximation schemes for independent packing problems on fractionally tree-independence-number-fragile graph classes. Our approach unifies and extends several known polynomial-time approximation schemes on seemingly unrelated graph classes, such as classes of intersection graphs of fat objects in a fixed dimension or proper minor-closed classes. We also study the related notion of layered tree-independence number, a relaxation of layered treewidth.

Subject Classification

ACM Subject Classification
  • Theory of computation → Approximation algorithms analysis
Keywords
  • Independent packings
  • intersection graphs
  • polynomial-time approximation schemes
  • tree-independence number

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