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A framework for ETH-tight algorithms and lower bounds in geometric intersection graphs

Published: 20 June 2018 Publication History

Abstract

We give an algorithmic and lower-bound framework that facilitates the construction of subexponential algorithms and matching conditional complexity bounds. It can be applied to a wide range of geometric intersection graphs (intersections of similarly sized fat objects), yielding algorithms with running time 2O(n1−1/d) for any fixed dimension d≥ 2 for many well known graph problems, including Independent Set, r-Dominating Set for constant r, and Steiner Tree. For most problems, we get improved running times compared to prior work; in some cases, we give the first known subexponential algorithm in geometric intersection graphs. Additionally, most of the obtained algorithms work on the graph itself, i.e., do not require any geometric information. Our algorithmic framework is based on a weighted separator theorem and various treewidth techniques.
The lower-bound framework is based on a constructive embedding of graphs into d-dimensional grids, and it allows us to derive matching 2Ω(n1−1/d) lower bounds under the Exponential Time Hypothesis even in the much more restricted class of d-dimensional induced grid graphs.

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cover image ACM Conferences
STOC 2018: Proceedings of the 50th Annual ACM SIGACT Symposium on Theory of Computing
June 2018
1332 pages
ISBN:9781450355599
DOI:10.1145/3188745
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 20 June 2018

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Author Tags

  1. Geometric intersection graphs
  2. Geometric separator
  3. Graph minors
  4. Subexponential algorithms
  5. Treewidth

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STOC '18
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STOC '18: Symposium on Theory of Computing
June 25 - 29, 2018
CA, Los Angeles, USA

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Overall Acceptance Rate 1,469 of 4,586 submissions, 32%

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Cited By

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  • (2024)Parameterized Approximation Algorithms and Lower Bounds for k-Center Clustering and VariantsAlgorithmica10.1007/s00453-024-01236-186:8(2557-2574)Online publication date: 13-May-2024
  • (2023)Grid recognition: Classical and parameterized computational perspectivesJournal of Computer and System Sciences10.1016/j.jcss.2023.02.008136(17-62)Online publication date: Sep-2023
  • (2022)Parameterized Study of Steiner Tree on Unit Disk GraphsAlgorithmica10.1007/s00453-022-01020-z85:1(133-152)Online publication date: 5-Aug-2022
  • (2022)The Fine-Grained Complexity of Multi-Dimensional Ordering PropertiesAlgorithmica10.1007/s00453-022-01014-x84:11(3156-3191)Online publication date: 22-Aug-2022
  • (2021)Almost Tight Lower Bounds for Hard Cutting Problems in Embedded GraphsJournal of the ACM10.1145/345070468:4(1-26)Online publication date: 14-Jul-2021
  • (2021)Reverse Shortest Path Problem for Unit-Disk GraphsAlgorithms and Data Structures10.1007/978-3-030-83508-8_47(655-668)Online publication date: 31-Jul-2021
  • (2020)A Framework for Exponential-Time-Hypothesis--Tight Algorithms and Lower Bounds in Geometric Intersection GraphsSIAM Journal on Computing10.1137/20M132087049:6(1291-1331)Online publication date: 15-Dec-2020
  • (2020)Near-Optimal Algorithms for Shortest Paths in Weighted Unit-Disk GraphsDiscrete & Computational Geometry10.1007/s00454-020-00219-7Online publication date: 24-Jun-2020
  • (2020)Lower Bounds for Dominating Set in Ball Graphs and for Weighted Dominating Set in Unit-Ball GraphsTreewidth, Kernels, and Algorithms10.1007/978-3-030-42071-0_5(31-48)Online publication date: 20-Apr-2020
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