A general mathematics of names

  • Authors:
  • Murdoch J. Gabbay

  • Affiliations:
  • Heriot-Watt University, Department of Computer Science, Edinburg EH14 4AS, UK

  • Venue:
  • Information and Computation
  • Year:
  • 2007

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Abstract

We introduce FMG (Fraenkel-Mostowski Generalised) set theory, a generalisation of FM set theory which allows binding of infinitely many names instead of just finitely many names. We apply this generalisation to show how three presentations of syntax-de Bruijn indices, FM sets, and name-carrying syntax-have a relation generalising to all sets and not only sets of syntax trees. We also give syntax-free accounts of Barendregt representatives, scope extrusion, and other phenomena associated to @a-equivalence. Our presentation uses a novel presentation based not on a theory but on a concrete model U.