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The crossing number of a projective graph is quadratic in the face--width (Extended abstract)

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F07%3A00020424" target="_blank" >RIV/00216224:14330/07:00020424 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989100:27240/07:00014965

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The crossing number of a projective graph is quadratic in the face--width (Extended abstract)

  • Original language description

    We show that for each integer $ggeq0$ there is a constant $c&gt;0$ such that every graph that embeds in the projective plane with sufficiently large face--width $r$ has crossing number at least $c.r^2$ in the orientable surface of genus $g$. As a corollary, we give a polynomial time constant factor approximation algorithm for the crossing number of projective graphs with bounded degree.

  • Czech name

    Průsečíkové číslo projektivních grafů je kvadratické ve stěnové šířce

  • Czech description

    Dokážeme, že pro každé g existuje konstanta c&gt;0 taková, že každý graf nakreslený v projektivní rovině se stěnovou šířkou r má průsečíkové číslo c.r^2 na orientovaném povrchu rodu g. Důsledkem je také aproximační algoritmus.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Electronic Notes in Discrete Mathematics

  • ISSN

    1571-0653

  • e-ISSN

  • Volume of the periodical

    29

  • Issue of the periodical within the volume

    C

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    5

  • Pages from-to

    219-223

  • UT code for WoS article

  • EID of the result in the Scopus database