Authors
T. M. Seoudy
Fayoum University Faculty of Science Department of Mathematics, Fayoum, Egypt
M. K. Aouf
Mansoura University Faculty of Science Department of Mathematics, Mansoura, Egypt
© 2014 T. M. Seoudy, M. K. Aouf, published by Sapientia Hungarian University of Transylvania
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.