Every twofold triple system can be directed

Charles J. Colbourn, Marlene J. Colbourn

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Every twofold triple system, or block design with k = 3 and λ = 2, is the underlying design of a directed triple system. Applications to the existence and enumeration of directed triple systems are described.

Original languageEnglish (US)
Pages (from-to)375-378
Number of pages4
JournalJournal of Combinatorial Theory, Series A
Issue number3
StatePublished - May 1983
Externally publishedYes

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Discrete Mathematics and Combinatorics
  • Computational Theory and Mathematics


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