**Vol. 8, No. 2, February 2012**

**Contents**

**Title:** **Edge-domsaturation Number of a Graph**

**Authors:** D. Nidha and R. Kala

**Abstract:** The edge-domsaturation number ds′(G) of a graph G = (V,E) is the least positive integer k such that every edge of G lies in an edge dominating set of cardinality k. The connected edge-domsaturation number ds′_{c}(G) of a graph G = (V,E) is the least positive integer k such that every edge of G lies in a connected edge dominating set of cardinality k. In this paper, we obtain several results connecting ds′(G), ds′_{c}(G)and other graph theoretic parameters.

**PP. **1-10

**Title:** **Pre-Semi-Closed Sets and Pre-Semi-Separation Axioms in Intuitionistic Fuzzy Topological Spaces**

**Authors: **A. Bhattacharjeeand R.N. Bhaumik

**Abstract:*** *The aim of this paper is to introduce and study different properties of pre-semi closed sets in intuitionistic fuzzy topological spaces. As applications to pre-semi-closed sets we introduce pre-semi T_{1/2}-spaces, semi- pre T_{1/3} space and pre-semi T_{3/4}-spaces and obtain some of their basic properties.

**PP. **11-17

**Title:** **Optical Fresnel-Wavelet Transforms for Certain Space of Generalized Functions**

**Author:** S.K.Q. Al-Omari

**Abstract:** The theory of the diffraction Fresnel transform is extended to certain spaces of Schwartz distributions. In the context of Boehmian spaces, the diffraction Fresnel transform is obtained as a continuous function. Convergence with respect to δ and Δ convergences is well defined.

**PP. **18-27

**Title:** **A Common Fixed Point Theorem Under Certain Conditions**

**Authors:** R. Umamaheshwar Rao and V. Srinivas

**Abstract:** The aim of this paper is to present a common fixed point theorem in a metric space which extends the results of B. Fisher, G.Jungck and P.C. Lohani & V.H. Bhadshah using the weaker conditions such as Reciprocally continuous, Compatible mappings, Weakly compatible and Associated sequence.

**PP. **28-33

**Authors:** Erhan Piṣkin and Necat Polat

**Abstract:** In this paper we consider the decay rate and the blow up of solutions for the initial and Dirichlet boundary value problem for coupled a class of nonlinear higher order wave equations, in a bounded domain.

**PP. **34-48

**Title:** **Lacunary Invariant Statistical Convergence of Fuzzy Numbers**

**Authors:** Mehmet Açıkgöz and Ayhan Esi

**Abstract:** In this paper, we introduce the concepts of invariant convergence, lacunary invariant statistical convergence of sequences of fuzzy numbers and lacunary strongly invariant convergence of sequences of fuzzy numbers. We give some relations related to these concepts.

**PP. **49-59

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