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Some Hard Problems on Matroid Spikes

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F07%3A00020008" target="_blank" >RIV/00216224:14330/07:00020008 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989100:27240/07:00015019

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Some Hard Problems on Matroid Spikes

  • Original language description

    Spikes form an interesting class of $3$-connected matroids of branch-width~$3$. We show that some computational problems are hard on spikes with given matrix representations over infinite fields. Namely, the question whether a given spike is the free spike is co-$NP$-hard (though the property itself is definable in monadic second-order logic); and the task to compute the Tutte polynomial of a spike is $#P$-hard (even though that can be solved efficiently on all matroids of bounded branch-width which are represented over a finite field).

  • Czech name

    O některých těžkých problémech na matroidech

  • Czech description

    Ukážeme několik těžkých výpočetních problémů na zvláštních matroidech zvaných spikes reprezentovaných maticemi nad nekonečnými tělesy. Jmenovitě jsou těžké problémy rozeznání volného spike nebo výpočtu Tuttova polynomu nad spike.

Classification

  • Type

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

  • CEP classification

    IN - Informatics

  • 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

    Theory of Computing Systems

  • ISSN

    1432-4350

  • e-ISSN

  • Volume of the periodical

    41

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    12

  • Pages from-to

    551-562

  • UT code for WoS article

  • EID of the result in the Scopus database