chapter  10
Extrema and Variational Calculus
WithRussell L. Herman
Pages 70

The reader will find no figures in this work. The methods which I set forth do not require either constructions or geometrical or mechanical reasonings: but only algebraic operations, subject to a regular and uniform rule of procedure.”—Joseph-Louis Lagrange (1736–1813) Preface to Méchanique Analytique.