Godsil–McKay switching and twisted Grassmann graphs

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3 Citations (Scopus)


We show that the twisted Grassmann graphs introduced by Van Dam and Koolen are obtained by Godsil–McKay switching applied to the Grassmann graphs. The partition for the switching is constructed by a polarity of a hyperplane.

Original languageEnglish
Pages (from-to)173-179
Number of pages7
JournalDesigns, Codes, and Cryptography
Issue number1-2
Publication statusPublished - 2017 Jul 1


  • Distance-regular graph
  • Geometric design
  • Graph spectra
  • Grassmann graph
  • Polarity

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science Applications
  • Discrete Mathematics and Combinatorics
  • Applied Mathematics


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