FUZZY SETS AND SYSTEMS, cilt.101, sa.1, ss.185-190, 1999 (SCI-Expanded)
Various concepts related to smooth topological spaces have been introduced, and relations among them studied by several authors [2-6]. In this pager we introduce the notions of smooth, quasi-smooth and weak smooth structure, showing that various properties of a smooth topological space can be expressed in terms of these structures. In particular, the definitions and the results of [2-6] may be expressed in terms of the smooth and quasi-smooth structures. Then we will set out the fundamental concepts of these three structures and the relations between them. (C) 1999 Elsevier Science B.V. All rights reserved.