Nowhere-zero 6-flows

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We prove that every graph with no isthmus has a nowhere-zero 6-flow, that is, a circulation in which the value of the flow through each edge is one of ±1, ±2,..., ±5. This improves Jaeger's 8-flow theorem, and approaches Tutte's 5-flow conjecture.

Original languageEnglish (US)
Pages (from-to)130-135
Number of pages6
JournalJournal of Combinatorial Theory, Series B
Issue number2
StatePublished - Apr 1981
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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