Lattice-valued convergence spaces and regularity

  • Authors:
  • Gunther Jäger

  • Affiliations:
  • Department of Statistics, Rhodes University, P.O. Box 94, 6140 Grahamstown, South Africa

  • Venue:
  • Fuzzy Sets and Systems
  • Year:
  • 2008

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Abstract

We define a regularity axiom for lattice-valued convergence spaces where the lattice is a complete Heyting algebra. To this end, we generalize the characterization of regularity by a ''dual form'' of a diagonal condition. We show that our axiom ensures that a regular T1-space is separated and that regularity is preserved under initial constructions. Further we present an extension theorem for a continuous mapping from a subspace to a regular space. A characterization in the restricted case that the lattice is a complete Boolean algebra in terms of the closure of an L-filter is given.