Volume 6: January - December 1996

Issue 1: 1996

Abstract


Note on a lemma of Ladkin

  • Note on a lemma of Ladkin
  • A. Galton Department of Computer Science, University of Exeter, Exeter EX4 4PT, UK

    ABSTRACT

    Allen and Hayes proposed five axioms for the logic of temporal intervals; Ladkin claimed that the fifth axiom was a consequence of the first three. The purpose of this short note is to show that this is not in fact the case, thus vindicating Allen and Hayes. We conclude with a discussion of what light this demonstration throws on the role played by the fifth axiom.

    Pages: 3 - 6

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