1,720,970 research outputs found
More on weak alpha-openness
No full textIn [6] the authors, introduced the notion of weak α-openness and
investigated its fundamental properties. In this paper we investigate some
more properties of this type of openness. In this connection, we obtain a
new decomposition of α-openness and it is also shown that weakly α-open
bijections preserve clopen sets
Limits and ext functor
No full textThe study of the flow of a gas in long tubes is of special interest for the transport of industrial fluids through pipeline networks. In this paper the problem studied is that of the evolution of acceleration waves (a.w.) until they become shock waves. For the flow models considered we have evaluated the critical time at which this event takes place as a function of the initial discontinuity amplitude
A new generalization of contra-continuity via Levine's g-closed sets
No full textIn [Dontchev J. Contra-continuous functions and strongly S-closed spaces. Int J Math Math Sci 1996;19:303–10], Dontchev introduced and investigated a new notion of continuity called contra-continuity. Recently, Jafari and Noiri [Jafari S, Noiri T. Contra-a-continuous functions between topological spaces. Iran Int J Sci 2001;2:153–67, Jafari S, Noiri T. Contra-super-continuous functions. Ann Univ Sci Budapest 1999;42:27–34, Jafari S, Noiri T. On contraprecontinuous functions. Bull Malaysian Math Sci Soc 2002;25(2):115–28] introduced new generalizations of contracontinuity called contra-a-continuity, contra-super-continuity and contra-precontinuity. In this paper, we introduce and investigate a generalization of contra-continuity by utilizing Levine’s generalized closed sets
- …
