The analysis of directed triple systems by refinement

Marlene J. Colbourn, Charles J. Colbourn

Research output: Contribution to journalArticlepeer-review


An invariant for deciding isomorphism of directed triple systems is developed by exploiting the asymmetry of blocks. This invariant can be computed efficiently, and for small systems usually succeeds in determining isomorphism. It is shown, however, that for all orders which are 1 (mod 3), there exist systems for which the invariant gives no information regarding isomorphism.

Original languageEnglish (US)
Pages (from-to)97-103
Number of pages7
JournalNorth-Holland Mathematics Studies
Issue numberC
StatePublished - Jan 1 1982
Externally publishedYes

ASJC Scopus subject areas

  • Mathematics(all)


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