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Publication detail
ŠEDA, M.
Original Title
The Maximum Clique Problem and Integer Programming Models, Their Modifications, Complexity and Implementation
Type
journal article in Web of Science
Language
English
Original Abstract
The maximum clique problem is a problem that takes many forms in optimization and related graph theory problems, and also has many applications. Because of its NP-completeness (nondeterministic polynomial time), the question arises of its solvability for larger instances. Instead of the traditional approaches based on the use of approximate or stochastic heuristic methods, we focus here on the use of integer programming models in the GAMS (General Algebraic Modelling System) environment, which is based on exact methods and sophisticated deterministic heuristics incorporated in it. We propose modifications of integer models, derive their time complexities and show their direct use in GAMS. GAMS makes it possible to find optimal solutions to the maximum clique problem for instances with hundreds of vertices and thousands of edges within minutes at most. For extremely large instances, good approximations of the optimum are given in a reasonable amount of time. A great advantage of this approach over all the mentioned algorithms is that even if GAMS does not find the best known solution within the chosen time limit, it displays its value at the end of the calculation as a reachable bound.
Keywords
clique, independent set;,GAMS, NP-complete problem, integer programming
Authors
Released
26. 10. 2023
Publisher
MDPI
Location
Basel
ISBN
2073-8994
Periodical
Symmetry
Year of study
15
Number
11
State
Swiss Confederation
Pages from
1
Pages to
16
Pages count
URL
https://www.mdpi.com/2073-8994/15/11/1979
Full text in the Digital Library
http://hdl.handle.net/11012/245086
BibTex
@article{BUT185001, author="Miloš {Šeda}", title="The Maximum Clique Problem and Integer Programming Models, Their Modifications, Complexity and Implementation", journal="Symmetry", year="2023", volume="15", number="11", pages="1--16", doi="10.3390/sym15111979", issn="2073-8994", url="https://www.mdpi.com/2073-8994/15/11/1979" }