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- W4380051920 abstract "In the 70 s, Berge introduced 1-extendable graphs (also called B-graphs), which are graphs where every vertex belongs to a maximum independent set. Motivated by an application in the design of wireless networks, we study the computational complexity of 1-extendability, the problem of deciding whether a graph is 1-extendable. We show that, in general, 1-extendability cannot be solved in $$2^{o(n)}$$ time assuming the Exponential Time Hypothesis, where n is the number of vertices of the input graph, and that it remains NP-hard in subcubic planar graphs and in unit disk graphs (which is a natural model for wireless networks). Although 1-extendability seems to be very close to the problem of finding an independent set of maximum size (a.k.a. Maximum Independent Set), we show that, interestingly, there exist 1-extendable graphs for which Maximum Independent Set is NP-hard. Finally, we investigate a parameterized version of 1-extendability." @default.
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- W4380051920 date "2023-06-08" @default.
- W4380051920 modified "2023-09-25" @default.
- W4380051920 title "1-Extendability of Independent Sets" @default.
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- W4380051920 doi "https://doi.org/10.1007/s00453-023-01138-8" @default.
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