This book brings together the essential ideas and methods behind applications of variational theory in theoretical physics and chemistry. The emphasis is on und

This book reflects the strong connection between calculus of variations and the applications for which variational methods form the foundation.

An Introduction to Lagrangian Mechanics begins with a proper historical perspective on the Lagrangian method by presenting Fermat's Principle of Least Time (as

Classic undergraduate text explores wave functions for the hydrogen atom, perturbation theory, the Pauli exclusion principle, and the structure of simple and co