Abstract:
We present one more proof of the fact that the class of proper interval graphs is precisely the class of unit interval graphs. The proof leads to a new and efficient O (n) time and space algorithm that transforms a proper interval model of the graph into a unit model, where all the extremes are integers in the range 0 to O (n2), solving a problem posed by Gardi (Discrete Math., 307 (22), 2906-2908, 2007). © 2009 Elsevier B.V. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Short Models for Unit Interval Graphs |
Autor: | Lin, M.C.; Soulignac, F.J.; Szwarcfiter, J.L. |
Filiación: | Departamento de Computación, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina Universidade Federal do Rio de Janeiro, Inst. de Matemática, NCE, Caixa Postal 2324, 20001-970 Rio de Janeiro, RJ, Brazil
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Palabras clave: | algorithms and data structures; efficient representation; graph theory; proper interval graphs; unit interval graphs |
Año: | 2009
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Volumen: | 35
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Número: | C
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Página de inicio: | 247
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Página de fin: | 255
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DOI: |
http://dx.doi.org/10.1016/j.endm.2009.11.041 |
Título revista: | Electronic Notes in Discrete Mathematics
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Título revista abreviado: | Electron. Notes Discrete Math.
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ISSN: | 15710653
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15710653_v35_nC_p247_Lin |
Referencias:
- Bogart, K.P., West, D.B., A short proof that "proper = unit" (1999) Discrete Math., 201 (1-3), pp. 21-23
- Corneil, D.G., A simple 3-sweep LBFS algorithm for the recognition of unit interval graphs (2004) Discrete Appl. Math., 138 (3), pp. 371-379
- Corneil, D.G., Kim, H., Natarajan, S., Olariu, S., Sprague, A.P., Simple linear time recognition of unit interval graphs (1995) Inform. Process. Lett., 55 (2), pp. 99-104
- Gardi, F., The Roberts characterization of proper and unit interval graphs (2007) Discrete Math., 307 (22), pp. 2906-2908
- Lin, M.C., Rautenbach, D., Soulignac, F.J., Szwarcfiter, J.L., Powers of Cycles, Powers of Paths and Distance Graphs (2008), Submitted; Lin, M.C., Szwarcfiter, J.L., Unit circular-arc graph representations and feasible circulations (2008) SIAM J. Discrete Math., 22, pp. 409-423
- Roberts, F.S., Indifference graphs (1969) Proof Techniques in Graph Theory, pp. 139-146. , (Proc. Second Ann Arbor Graph Theory Conf., Ann Arbor, Mich., 1968)
- Spinrad, J.P., (2003) Efficient graph representations, , American Mathematical Society
Citas:
---------- APA ----------
Lin, M.C., Soulignac, F.J. & Szwarcfiter, J.L.
(2009)
. Short Models for Unit Interval Graphs. Electronic Notes in Discrete Mathematics, 35(C), 247-255.
http://dx.doi.org/10.1016/j.endm.2009.11.041---------- CHICAGO ----------
Lin, M.C., Soulignac, F.J., Szwarcfiter, J.L.
"Short Models for Unit Interval Graphs"
. Electronic Notes in Discrete Mathematics 35, no. C
(2009) : 247-255.
http://dx.doi.org/10.1016/j.endm.2009.11.041---------- MLA ----------
Lin, M.C., Soulignac, F.J., Szwarcfiter, J.L.
"Short Models for Unit Interval Graphs"
. Electronic Notes in Discrete Mathematics, vol. 35, no. C, 2009, pp. 247-255.
http://dx.doi.org/10.1016/j.endm.2009.11.041---------- VANCOUVER ----------
Lin, M.C., Soulignac, F.J., Szwarcfiter, J.L. Short Models for Unit Interval Graphs. Electron. Notes Discrete Math. 2009;35(C):247-255.
http://dx.doi.org/10.1016/j.endm.2009.11.041