Author/Authors :
Sandeep Narayan، K. R. نويسنده K R Sandeep Narayan, Assistant Professor, Dept of Mathematics, Jyothi Engineering College, Cheruthuruthy ,Thrissur, Kerala, India 679531 , , Sunitha، M. S. نويسنده M S Sunitha, Associate Professor, Dept of Mathematics, National Institute of Technology, Calicut ,