The book is based on research presentations at the international conference, ¿Emerging Trends in Applied Mathematics: In the Memory of Sir Asutosh Mookerjee, S.N. Bose, M.N. Saha and N.R. Sen¿, held at the Department of Applied Mathematics, University of Calcutta, during 12¿14 February 2014. It focuses on various emerging and challenging topics in the field of applied mathematics and theoretical physics. The book will be a valuable resource for postgraduate students at higher levels and researchers in applied mathematics and theoretical physics. Researchers presented a wide variety of themes in applied mathematics and theoretical physics¿such as emergent periodicity in a field of chaos; Ricci flow equation