IDEAS home Printed from https://ideas.repec.org/h/spr/sprchp/978-1-4613-1395-3_10.html
   My bibliography  Save this book chapter

Spreads in Strongly Regular Graphs

In: Designs and Finite Geometries

Author

Listed:
  • Willem H. Haemers

    (Tilburg University)

  • Vladimir D. Tonchev

    (Michigan Technological University)

Abstract

A spread of a strongly regular graph is a partition of the vertex set into cliques that meet Delsarte’s bound (also called Hoffman’s bound). Such spreads give rise to colorings meeting Hoffman’s lower bound for the chromatic number and to certain imprimitive three-class association schemes. These correspondences lead to conditions for existence. Most examples come from spreads and fans in (partial) geometries. We give other examples, including a spread in the McLaughlin graph. For strongly regular graphs related to regular two-graphs, spreads give lower bounds for the number of non-isomorphic strongly regular graphs in the switching class of the regular two-graph.

Suggested Citation

  • Willem H. Haemers & Vladimir D. Tonchev, 1996. "Spreads in Strongly Regular Graphs," Springer Books, in: Dieter Jungnickel (ed.), Designs and Finite Geometries, pages 145-157, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4613-1395-3_10
    DOI: 10.1007/978-1-4613-1395-3_10
    as

    Download full text from publisher

    To our knowledge, this item is not available for download. To find whether it is available, there are three options:
    1. Check below whether another version of this item is available online.
    2. Check on the provider's web page whether it is in fact available.
    3. Perform a
    for a similarly titled item that would be available.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:spr:sprchp:978-1-4613-1395-3_10. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.springer.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.