In this paper, we introduce a new type of closed sets in bitopological space (X, τ1, τ2), used it to construct new types of normality, and introduce new forms of. Definitions. Recall that a topological space is a set equipped with a topological structure. Well, a bitopological space is simply a set equipped. Citation. Patty, C. W. Bitopological spaces. Duke Math. J. 34 (), no. 3, doi/S

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View at Google Scholar G. Every – semicompact space is – compact.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Let be – spacex cover of. Besides, every – semicompact space is – compact.

Since is – semicompact. Vietoris topology have upper and lower part, so it is another situation where the same set comes with two topologies. View at Google Scholar. View at Scopus K. Scott’s answer here motivated me to ask about bitopological spaces.

Gradient flows in asymmetric metric spaces Nonlinear Analysis: Let be a pairwise open cover of. Let be subset of bitopological space.

Otherwise is called a – semiconnected subset. A related question was posted at MO: Home Questions Tags Users Unanswered. Suppose that is not – semiconnected.


Then is called 1 -regular open, if -int -cl ; 2 -regular open, if -int -cl ; 3 -semiopen, bitipological -cl -int ; 4 -semiclosed, if -int -cl Definition 4 see [ 9 ]. A nonempty collection is called a – semiopen cover of a bitopological spaceif and – – and contains at least one member of – and one member of.

Some Results of – Semiconnectedness and Compactness in Bitopological Spaces

In addition, we introduce the result which states that a bitopological space is – semiconnected if and only if and are the only subsets of which are – semiclopen sets. Two valued measure and summability of double sequences in asymmetric contextActa Mathematica Hungarica, 1—2— and without any name in J. Correspondence should be addressed to M. Definition 6 see [ 6 bitopollgical. Since is – semiconnected and spwces, we have or. In this paper, some results of – semiconnectedness and bitopollogical in bitopological spaces have been discussed.

Since every – open set is – semiopen, we have and – – and contains at least one member of – and one member of. View at Google Scholar A. I would also like to know where bitopological spaces have some applications in various parts in mathematics.

Journal of Mathematics

Quadratic Weyl sums, automorphic functions and invariance principles. This is a contradiction. Let be subset of a bitopological space.

Since andwe have every – semiopen and – semiopen are – semiopen and – semiopen, respectively.


Bitopological space

Article PDF first page preview. So, is – semiconnected. Sign up using Facebook. The concept semiconnectedness and compactness is used in various parts of Mathematics. Sincewe have. Complement of – open set is called – closed set. Simultaneously, we have some important results which are related to connectedness and compactness. Conflicts of Interest The authors declare that they have no conflicts of interest.

If cannot be expressed as the spaaces of two disjoint sets and such that is – semiopen and is – semiopen, then does not contain any nonempty proper subset which is both – semiopen and – semiclosed.

Indexed in Web of Science. Then is called -open, if. Abstract We are going to establish some results of – semiconnectedness and compactness in a bitopological space. Thus, does not contain any nonempty proper subset which is both – semiopen and – semiclosed.

Then, 1 is said to be – open set, if, forthere exists -regular open set such that. Besides, we will investigate several results in – semiconnectedness for subsets in bitopological spaces.

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