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L(2,1,1)-Labeling Is NP-Complete for Trees

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 6108))

Abstract

An L(p 1,p 2,p 3)-labeling of a graph G with span λ is a mapping f that assigns each vertex u of G an integer label 0 ≤ f(u) ≤ λ such that |f(u) − f(v)| ≥ p i whenever vertices u and v are of distance i for i ∈ {1,2,3}. We show that testing whether a given graph has an L(2,1,1)-labeling with some given span λ is NP-complete even for the class of trees.

Supported by EPSRC (EP/GO43434/1) and the Royal Society ((JP090172).

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Golovach, P.A., Lidický, B., Paulusma, D. (2010). L(2,1,1)-Labeling Is NP-Complete for Trees. In: Kratochvíl, J., Li, A., Fiala, J., Kolman, P. (eds) Theory and Applications of Models of Computation. TAMC 2010. Lecture Notes in Computer Science, vol 6108. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-13562-0_20

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  • DOI: https://doi.org/10.1007/978-3-642-13562-0_20

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-13561-3

  • Online ISBN: 978-3-642-13562-0

  • eBook Packages: Computer ScienceComputer Science (R0)

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