**Volume
9 Number 4 (2013)**

**Contents**

**Curvature Tensors on Three-Dimensional Trans-Sasakian Manifolds**

pp. 317-323

**Authors:
***Dakshayani A.
Patil and C.S. Bagewadi*

**Size-Biased Discrete Two Parameters Poisson-Lindley Distribution and its Applications**

pp. 325-334

**Author:
*** Rama Shanker*

**Relative Topological Entropy of Continuous Functions on Compact Topological Spaces**

pp. 335-340

**Authors:
*** Mohamad Hosein Asadian and Abolfazl Ebrahimzadeh*

**Absolutely Flatness of Modules in Exact Sequences**

pp. 341-343

**Authors:
*** Duraivel T, Mangayarcarassy S and Athimoolam R*

**A New Class of Entire Sequences of Interval Numbers**

pp. 345-351

**Authors:
*** T. Balasubramanian and S. Zion Chella Ruth*

**Characterization of Random Packing by Some Disconnected Graphs**

pp. 353-362

**Authors:
*** Elachini V. Lal and Karakkattu S. Parvathy*

**Y – Domatic Number of a Bipartite Graph**

pp. 363-368

**Authors: ***Y. B. Venkatakrishnan*

**Common fixed point theorems of bivariate and self maps in d−metric spaces**

pp. 369–378

**Authors: ***A. Muraliraj*

**Existence and nonexistence of positive weak solutions for a class of weighted (p, q)-Laplacian nonlinear system**

pp. 379–387

**Authors: ***S. A. Khafagy*

**Two Warehouse Inventory Model for Deteriorating Items with Linear Trend in Demand, Shortages, TimeVarying Holding Cost Under Inflationary Conditions and Permisibble Delay In Payments**

pp. 389-406

**Authors: ***Shital S. Patel and Raman Patel*

**Generalized Modules over Semilattices of Rings**

pp. 407-434

**Authors: ***M. El-Ghali M. Abdallah*

**Some Universals in Strong Semilattices of Modules**

pp. 435-458

**Authors: ***M. El-Ghali M. Abdallah*