Concerning the complexity of deciding isomorphism of block designs

Marlene J. Colbourn, Charles Colbourn

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A construction is described to encode an arbitrary graph uniquely as a block design. This demonstrates that describing whether two block designs (without repeated blocks) are isomorphic is polynomial time equivalent to solving graph isomorphism. This result supplies evidence for the claim that isomorphism testing for block designs is a hard subcase of graph isomorphism.

Original languageEnglish (US)
Pages (from-to)155-162
Number of pages8
JournalDiscrete Applied Mathematics
Volume3
Issue number3
DOIs
StatePublished - 1981
Externally publishedYes

Fingerprint

Block Design
Graph Isomorphism
Isomorphism
Polynomial time
Isomorphic
Polynomials
Testing
Arbitrary
Graph in graph theory
Demonstrate

ASJC Scopus subject areas

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

Cite this

Concerning the complexity of deciding isomorphism of block designs. / Colbourn, Marlene J.; Colbourn, Charles.

In: Discrete Applied Mathematics, Vol. 3, No. 3, 1981, p. 155-162.

Research output: Contribution to journalArticle

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