A Framework for Exponential-Time-Hypothesis--Tight Algorithms and Lower Bounds in Geometric Intersection Graphs

M De Berg, HL Bodlaender, S Kisfaludi-Bak… - SIAM Journal on …, 2020 - SIAM
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 …

EPTAS and subexponential algorithm for maximum clique on disk and unit ball graphs

M Bonamy, É Bonnet, N Bousquet, P Charbit… - Journal of the ACM …, 2021 - dl.acm.org
A (unit) disk graph is the intersection graph of closed (unit) disks in the plane. Almost three
decades ago, an elegant polynomial-time algorithm was found for Maximum Clique on unit …

[HTML][HTML] Subexponential algorithms for variants of the homomorphism problem in string graphs

K Okrasa, P Rzążewski - Journal of Computer and System Sciences, 2020 - Elsevier
We consider subexponential algorithms finding weighted homomorphisms from intersection
graphs of curves (string graphs) with n vertices to a fixed graph H. We provide a complete …

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

M de Berg, HL Bodlaender, S Kisfaludi-Bak… - Proceedings of the 50th …, 2018 - dl.acm.org
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 …

Star colouring of bounded degree graphs and regular graphs

MA Shalu, C Antony - Discrete Mathematics, 2022 - Elsevier
A k-star colouring of a graph G is a function f: V (G)→{0, 1,…, k− 1} such that f (u)≠ f (v) for
every edge uv of G, and every bicoloured connected subgraph of G is a star. The star …

Optimality program in segment and string graphs

É Bonnet, P Rzążewski - Algorithmica, 2019 - Springer
Planar graphs are known to allow subexponential algorithms running in time 2^ O (n) 2 O (n)
or 2^ O (n\log n) 2 O (n log n) for most of the paradigmatic problems, while the brute-force …

Hyperbolic intersection graphs and (quasi)-polynomial time

S Kisfaludi-Bak - Proceedings of the Fourteenth Annual ACM-SIAM …, 2020 - SIAM
We study unit ball graphs (and, more generally, so-called noisy uniform ball graphs) in d-
dimensional hyperbolic space, which we denote by ℍ d. Using a new separator theorem, we …

EPTAS for max clique on disks and unit balls

M Bonamy, E Bonnet, N Bousquet… - 2018 IEEE 59th …, 2018 - ieeexplore.ieee.org
We propose a polynomial-time algorithm which takes as input a finite set of points of R^ 3
and computes, up to arbitrary precision, a maximum subset with diameter at most 1. More …

Contraction Decomposition in Unit Disk Graphs and Algorithmic Applications in Parameterized Complexity

F Panolan, S Saurabh, M Zehavi - ACM Transactions on Algorithms, 2024 - dl.acm.org
We give a new decomposition theorem in unit disk graphs (UDGs) and demonstrate its
applicability in the fields of Structural Graph Theory and Parameterized Complexity. First, our …

Contraction decomposition in unit disk graphs and algorithmic applications in parameterized complexity

F Panolan, S Saurabh, M Zehavi - Proceedings of the Thirtieth Annual ACM …, 2019 - SIAM
We give a new decomposition theorem in unit disk graphs (UDGs) and demonstrate its
applicability in the fields of Structural Graph Theory and Parameterized Complexity. First, our …