Calculus of Variations
Cambridge University Press, 1998 - Mathematics - 323 pages
This textbook on the calculus of variations leads the reader from the basics to modern aspects of the theory. One-dimensional problems and the classical issues such as Euler-Lagrange equations are treated, as are Noether's theorem, Hamilton-Jacobi theory, and in particular geodesic lines, thereby developing some important geometric and topological aspects. The basic ideas of optimal control theory are also given. The second part of the book deals with multiple integrals. After a review of Lebesgue integration, Banach and Hilbert space theory and Sobolev spaces (with complete and detailed proofs), there is a treatment of the direct methods and the fundamental lower semicontinuity theorems. Subsequent chapters introduce the basic concepts of the modern calculus of variations, namely relaxation, Gamma convergence, bifurcation theory and minimax methods based on the Palais-Smale condition. The prerequisites are knowledge of the basic results from calculus of one and several variables. After having studied this book, the reader will be well equipped to read research papers in the calculus of variations.
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arc-length assume assumption axiom of countability Banach space bifurcation bijective boundary condition bounded calculus of variations canonical equations Cauchy sequence Chapter class C2 compact consider constant construction convergent subsequence convex function coordinates critical points curve defined Definition denote derivative diffeomorphism Euler-Lagrange equations example exists F(xn finite dimensional Fredholm operator geodesic geodesic arc given hence Hilbert space Holder's inequality hypersurface implicit function theorem implies invariant Jacobi field Lebesgue Lemma Let F liminf linear subspace Lipschitz lower semicontinuous LP(A metric tensor minimizing sequence neighbourhood norm obtain orthogonal parameter parameterized proof of Theorem q.e.d. Corollary q.e.d. Theorem R U oo Rd be measurable reflexive result Riemannian satisfies sc~F Section shortest geodesic smooth Sobolev Sobolev spaces solution Springer subset Suppose T-convergence theory tions topology un)neN unique variational problems vector space weak derivative