Results on a Pre-T_2 Space and Pre-Stability

Abstract

This paper contains an equivalent statements of a pre- space, where are considered subsets of with the product topology. An equivalence relation between the preclosed set and a pre- space, and a relation between a pre- space and the preclosed set with some conditions on a function are found. In addition, we have proved that the graph of is preclosed in if is a pre- space, where the equivalence relation on is open.
 On the other hand, we introduce the definition of a pre-stable ( pre-stable) set by depending on the concept of a pre-neighborhood, where we get that every stable set is pre-stable. Moreover, we obtain that a pre-stable ( pre-stable) set is positively invariant (invariant), and we add a condition on this set to prove the converse. Finally, a relationship between, (i) a pre-stable ( pre-stable) set and its component (ii) a pre- space and a (positively critical point) critical point, are gotten.

A Study on Nψβ and Nβψ - Closed sets in Neutrosophic Topological spaces

“…In general topological space, several authors introduced various open sets such as Pre-stable set by Anmar Hashim Jasim 1 and G-open set by Jalal Hatem Hussein 2 . Florentin Smarandache 3 defined the neutrosophicset on three components (t,f,i) = (truth, falsehood, indeterminacy).This opened up a wide range of investigation in terms of neutosophic topology and its application in decision-making algorithms.…”