Polychromatic Colorings of Plane Graphs.
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| Title: | Polychromatic Colorings of Plane Graphs. |
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| Authors: | Alon, Noga1 nogaa@tau.ac.il, Berke, Robert2 berker@ethz.ch, Buchin, Kevin3 buchin@cs.uu.nl, Buchin, Maike3 maike@cs.uu.nl, Csorba, Péter4 pcsorba@win.tue.nl, Shannigrahi, Saswata5 saswata@tcs.tifr.res.in, Speckmann, Bettina4 speckman@win.tue.nl, Zumstein, Philipp6 zuphilip@inf.ethz.ch |
| Source: | Discrete & Computational Geometry. Oct2009, Vol. 42 Issue 3, p421-442. 22p. 9 Diagrams. |
| Subjects: | Polychromy, Central processing units, Dynamic random access memory, Computer input-output equipment, Computer storage device industry, Computer systems, Computer networks |
| Abstract: | We show that the vertices of any plane graph in which every face is incident to at least g vertices can be colored by ⌊(3 g−5)/4 ⌋ colors so that every color appears in every face. This is nearly tight, as there are plane graphs where all faces are incident to at least g vertices and that admit no vertex coloring of this type with more than ⌊(3 g+1)/4 ⌋ colors. We further show that the problem of determining whether a plane graph admits a vertex coloring by k colors in which all colors appear in every face is in ℘ for k=2 and is $\mathcal{NP}$ -complete for k=3,4. We refine this result for polychromatic 3-colorings restricted to 2-connected graphs which have face sizes from a prescribed (possibly infinite) set of integers. Thereby we find an almost complete characterization of these sets of integers (face sizes) for which the corresponding decision problem is in ℘, and for the others it is $\mathcal{NP}$ -complete. [ABSTRACT FROM AUTHOR] |
| Copyright of Discrete & Computational Geometry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 42992871 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Polychromatic Colorings of Plane Graphs. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Alon%2C+Noga%22">Alon, Noga</searchLink><relatesTo>1</relatesTo><i> nogaa@tau.ac.il</i><br /><searchLink fieldCode="AR" term="%22Berke%2C+Robert%22">Berke, Robert</searchLink><relatesTo>2</relatesTo><i> berker@ethz.ch</i><br /><searchLink fieldCode="AR" term="%22Buchin%2C+Kevin%22">Buchin, Kevin</searchLink><relatesTo>3</relatesTo><i> buchin@cs.uu.nl</i><br /><searchLink fieldCode="AR" term="%22Buchin%2C+Maike%22">Buchin, Maike</searchLink><relatesTo>3</relatesTo><i> maike@cs.uu.nl</i><br /><searchLink fieldCode="AR" term="%22Csorba%2C+Péter%22">Csorba, Péter</searchLink><relatesTo>4</relatesTo><i> pcsorba@win.tue.nl</i><br /><searchLink fieldCode="AR" term="%22Shannigrahi%2C+Saswata%22">Shannigrahi, Saswata</searchLink><relatesTo>5</relatesTo><i> saswata@tcs.tifr.res.in</i><br /><searchLink fieldCode="AR" term="%22Speckmann%2C+Bettina%22">Speckmann, Bettina</searchLink><relatesTo>4</relatesTo><i> speckman@win.tue.nl</i><br /><searchLink fieldCode="AR" term="%22Zumstein%2C+Philipp%22">Zumstein, Philipp</searchLink><relatesTo>6</relatesTo><i> zuphilip@inf.ethz.ch</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Discrete+%26+Computational+Geometry%22">Discrete & Computational Geometry</searchLink>. Oct2009, Vol. 42 Issue 3, p421-442. 22p. 9 Diagrams. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polychromy%22">Polychromy</searchLink><br /><searchLink fieldCode="DE" term="%22Central+processing+units%22">Central processing units</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+random+access+memory%22">Dynamic random access memory</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+input-output+equipment%22">Computer input-output equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+storage+device+industry%22">Computer storage device industry</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+systems%22">Computer systems</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+networks%22">Computer networks</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We show that the vertices of any plane graph in which every face is incident to at least g vertices can be colored by ⌊(3 g−5)/4 ⌋ colors so that every color appears in every face. This is nearly tight, as there are plane graphs where all faces are incident to at least g vertices and that admit no vertex coloring of this type with more than ⌊(3 g+1)/4 ⌋ colors. We further show that the problem of determining whether a plane graph admits a vertex coloring by k colors in which all colors appear in every face is in ℘ for k=2 and is $\mathcal{NP}$ -complete for k=3,4. We refine this result for polychromatic 3-colorings restricted to 2-connected graphs which have face sizes from a prescribed (possibly infinite) set of integers. Thereby we find an almost complete characterization of these sets of integers (face sizes) for which the corresponding decision problem is in ℘, and for the others it is $\mathcal{NP}$ -complete. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Discrete & Computational Geometry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00454-009-9171-5 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 22 StartPage: 421 Subjects: – SubjectFull: Polychromy Type: general – SubjectFull: Central processing units Type: general – SubjectFull: Dynamic random access memory Type: general – SubjectFull: Computer input-output equipment Type: general – SubjectFull: Computer storage device industry Type: general – SubjectFull: Computer systems Type: general – SubjectFull: Computer networks Type: general Titles: – TitleFull: Polychromatic Colorings of Plane Graphs. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Alon, Noga – PersonEntity: Name: NameFull: Berke, Robert – PersonEntity: Name: NameFull: Buchin, Kevin – PersonEntity: Name: NameFull: Buchin, Maike – PersonEntity: Name: NameFull: Csorba, Péter – PersonEntity: Name: NameFull: Shannigrahi, Saswata – PersonEntity: Name: NameFull: Speckmann, Bettina – PersonEntity: Name: NameFull: Zumstein, Philipp IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 01795376 Numbering: – Type: volume Value: 42 – Type: issue Value: 3 Titles: – TitleFull: Discrete & Computational Geometry Type: main |
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