An Introduction to the Calculus of Variations and several others as well

and several others as well as their inverses

In one van Gogh admits: "I can't disguise from you the fact that I like the country

but for what it can still teach even the most sophisticated player

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An Introduction to the Calculus of Variations and several others as wellAn understanding of variational methods, the source of such fundamental theorems as the principle of least action and its various generalizations, is essential to the study of mathematical physics and applied mathematics. In this highly regarded text, aimed at advanced undergraduate and graduate students in mathematics, the author develops the calculus of variations both for its own intrinsic interest and because of its wide and powerful applications