Papers

P.G. Department of Mathematics, Nehru (P.G.) College, Chhibramau, Kannauj, U.P. (India)
E-mail : garg_manoj1972@yahoo.co.in

In the present paper, we prove a fixed point theorem in the form of rational expression. Our result generalizes and extends some well known previous results.

*Assistant Professor, Department of Mathematics, Quaid-E-millath government college,Chennai – 600002, TamilNadu (India)
** Associate Professor, Department of Mathematics, Quaid-E-millath government college, Chennai – 600002, TamilNadu (India)

In the present paper, a Fuzzy inventory model for deteriorating items has been developed with stock and time dependent demand for which the supplier permits a fixed trade credit period. This paper also assumes that excess demand is partially backlogged. All the inventory costs involved in this model are taken as triangular fuzzy numbers. Replenishment cycle length, the time at which shortage begins and the optimal total inventory cost are taken as decision variables. Sensitivity for this model is also studied. Graded mean representation is used to defuzzify the model. The advantage of proposed approach is that it is simple, gives the better result in relatively less computational work.

¹Department of Mathematics, St. Xavier’s College, Ahmedabad - 380009 (India)
 ²General Department, Government Polytechnic, Himmatnagar - 383001 (India)
E-mail: gjr.sachin@gmail.com E-mail: udayan64@yahoo.com

In this paper the authors have proved that prism graph Yn,2 is prime cordial except n = 1, 2 and 4 and the graph Yn,4 also
prime cordial for n  3. We have also proved that the generalized prism graph Y3,n, Y5,n, Y6,n and Y2p,n (for odd prime p) are prime cordial for n > 1 and Y4,n is also prime cordial for n > 2.

¹Department of Mathematics, Govindammal Aditanar College for Women, Tiruchendur-628215, Tamilnadu (India)
²Department of Mathematics, Aditanar College of Arts and Science, Tiruchendur-628216, Tamilnadu (India)

Focus of this paper is to introduce the concept of pairwise fuzzy ℭ - semi continuous, pairwise fuzzy ℭ - totally continuous, pairwise fuzzy ℭ - totally semi continuous and pairwise fuzzy ℭ - irresolute mappings of a fuzzy bitopological space where ℭ : [0,1]  [0,1] is a complement function. Several examples are given to illustrate the concepts introduced in this paper.

Department of Mathematics, Texas A&M University-Commerce Commerce, Texas 75429  USA

In a recent paper, a new category of topological properties called weakly Po properties were introduced and investigated. The search for a topological property that failed to be a weakly Po property led to the use of “not-T0” within that paper, and the investigation of other “not-separation axioms” and other weakly Pproperties in follow up papers. Within this paper, the study of weakly P properties and “notseparation axioms” continues with the Urysohn and weakly Urysohn axioms.

¹Dept of Mathematics, Justice Baheer Ahmed Sayeed College, Chennai (India)
²Principal, Kandasamy Naidu College, Chennai (India)

In this paper for the first time we define the new notion of n-ary semilattices under the intersection operation. Several new notions likes pseudo buds and uniform t-length n-ary semilattices are introduced and their properties analysed.

¹Department of Mathematics, Justice Baheer Ahmed Sayeed College, Chennai (India)
²Principal, Kandasamy Naidu College, Chennai (India)

In this paper for the first time authors define the new notion of merging of semilattices. The properties of merged semilattices is studied and several interesting results are proved in this direction.

P.G. Department of Mathematics, Nehru P. G. College, Chhibramau, Kannauj, U.P. (India)
E-mail: garg_manoj1972@yahoo.co.in Email: ssrathore.ait@gmail.com

In this paper, we introduce g -closed sets19 in bitopological spaces. Properties of these sets are investigated and we introduce the two new bitopoligical spaces (i, j)- T and (i, j)- T* spaces as applications. Further we introduce and study g -continuity19 in bitopological spaces.

Department of Mathematics, Pachaiyappa’s College, Chennai – 600 030 (India)

In this paper for the first time groupoid matrix are introduced and their properties are analysed. A matrix groupoid or a groupoid matrix is a collection of p × q matrices with entries from a groupoid (G, *) where groupoid matrix inherits the operation of G. Clearly groupoid matrix are non associative groupoids of finite order.

Department of Mathematics, Kumaun University Soban Singh Jeena campus, Almora (Uttarakhand) (India)

Hypersurfaces immersed in an almost hyperbolic Hermitian manifold studied by Dube and Mishra3. Almost hyperbolic hermite manifold have been studied by Dube2. Hypersurfaces of almost hyperbolic Hermitian manifold I,II ,have been studies by Bhatt and Dube1. The purpose of the present paper is to study the Quasi – Umbilical submanifold of co-dimension -2 of an almost hyperbolic manifold. We have obtained the condition for this submanifold, to be W –Quasi umbilic