""Introduction to the Calculus of Variations"" is a book written by William Elwood Byerly and first published in 1917. The book is a comprehensive introduction to the study of calculus of variations, which is a branch of mathematics that deals with finding the optimal solution to a given problem. The book covers a range of topics including the basic principles of the calculus of variations, the Euler-Lagrange equation, the Hamiltonian formulation, and the variational methods in mechanics. It also includes a number of examples and exercises to help readers understand the concepts and apply them to real-world problems. The book is written in a clear and concise style, making it accessible to both beginners and advanced learners. It is a valuable resource for students and researchers in mathematics, physics, and engineering who want to gain a deeper understanding of the calculus of variations.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.