Self-dual, not self-polar

A. E. Brouwer, Peter J. Cameron*, W. H. Haemers, D. A. Preece

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The smallest number of points of an incidence structure which is self-dual but not self-polar is 7. For non-binary structures (where a "point" may occur more than once in a "block") the number is 6.

Original languageEnglish
Pages (from-to)3051-3053
Number of pages3
JournalDiscrete Mathematics
Issue number23 SPEC. ISS.
Publication statusPublished - 6 Dec 2006


  • Incidence structure
  • Self-dual
  • Self-polar


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