ON THE RELATIONSHIPS BETWEEN TYPES OF L-CONVERGENCE SPACES

This paper focuses on the relationships between stratified L-convergence spaces, stratified strong L-convergence spaces and stratified levelwise L-convergence spaces. It has been known that: (1) a stratified L-convergence space is precisely a left-continuous stratified levelwise L-convergence space; and (2) a stratified strong L-convergence space is naturally a stratified Lconvergence space, but the converse is not true generally. In this paper, a strong left-continuity condition for stratified levelwise L-convergence space is given. It is proved that a stratified strong L-convergence space is precisely a strongly left-continuous stratified levelwise L-convergence space. Then a sufficient and necessary condition for a stratified L-convergence space to be a stratified strong L-convergence space is presented

Fuzzy Sets, Fuzzy Logic and Their Applications

The present book contains 20 articles collected from amongst the 53 total submitted manuscripts for the Special Issue “Fuzzy Sets, Fuzzy Loigic and Their Applications” of the MDPI journal Mathematics. The articles, which appear in the book in the series in which they were accepted, published in Volumes 7 (2019) and 8 (2020) of the journal, cover a wide range of topics connected to the theory and applications of fuzzy systems and their extensions and generalizations. This range includes, among others, management of the uncertainty in a fuzzy environment; fuzzy assessment methods of human-machine performance; fuzzy graphs; fuzzy topological and convergence spaces; bipolar fuzzy relations; type-2 fuzzy; and intuitionistic, interval-valued, complex, picture, and Pythagorean fuzzy sets, soft sets and algebras, etc. The applications presented are oriented to finance, fuzzy analytic hierarchy, green supply chain industries, smart health practice, and hotel selection. This wide range of topics makes the book interesting for all those working in the wider area of Fuzzy sets and systems and of fuzzy logic and for those who have the proper mathematical background who wish to become familiar with recent advances in fuzzy mathematics, which has entered to almost all sectors of human life and activity

Energy: A continuing bibliography with indexes (Issue 29)

This bibliography lists 1360 reports, articles, and other documents introduced into the NASA scientific and technical information system from January 1, 1981 through March 31, 1981