H.S. KASANA, Ph.D., is Professor and Head, Department of Mathematics and Computer Applications, Thapar Institute of Engineering and Technology, Patiala. He worked as ‘Visiting Fellow’ at Department of Mathematics, Uppsala University, Sweden in 1990. He has been nominated as ‘Senior Associate’ by UNESCO through International Centre for Theoretical Physics, Italy for a period of six years (2002–2007). He also worked as ‘Visiting Professor’ at Mathematisches förschungs Institut, Oberwolfach Germany, during 2003. Professor Kasana has published more than hundred research papers in international journals of repute and guided several research scholars for their Ph.D. degree. His topics of research interest are Complex Analysis, Approximation Theory, and Optimization Techniques. He has authored a book entitled Introductory Operations Research, published by Springer-Verlag, Berlin-Heidelberg (Germany).