Elsevier

Fuzzy Sets and Systems

Volume 204, 1 October 2012, Pages 27-39
Fuzzy Sets and Systems

Gähler's neighborhood condition for lattice-valued convergence spaces

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Abstract

We generalize a neighborhood condition from the category of convergence spaces to the category of lattice-valued convergence spaces. For a space in the category of convergence spaces, this condition is equivalent to being a topological space. It turns out that there are two meaningful generalizations of this condition to the category of lattice-valued convergence spaces. The first one guarantees that a space in a certain subcategory is a lattice-valued topological space. The other one is a levelwise condition which is equivalent to a generalization of Fischer's diagonal condition. The latter generalization is preserved under the embedding of the categories of convergence approach spaces and of probabilistic limit spaces into the category of lattice-valued convergence spaces.

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