Topological Methods for Variational Problems with Symmetries / Edition 1

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Overview

Symmetry has a strong impact on the number and shape of solutions to variational problems. This has been observed,
for instance, in the search for periodic solutions of
Hamiltonian systems or of the nonlinear wave equation; when one is interested in elliptic equations on symmetric domains or in the corresponding semiflows; and when one is looking for "special" solutions of these problems.
This book is concerned with Lusternik-Schnirelmann theory and Morse-Conley theory for group invariant functionals.
These topological methods are developed in detail with new calculations of the equivariant Lusternik-Schnirelmann category and versions of the Borsuk-Ulam theorem for very general classes of symmetry groups. The Morse-Conley theory is applied to bifurcation problems, in particular to the bifurcation of steady states and hetero-clinic orbits of
O(3)-symmetric flows; and to the existence of periodic solutions nearequilibria of symmetric Hamiltonian systems.
Some familiarity with the usualminimax theory and basic algebraic topology is assumed.

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Product Details

  • ISBN-13: 9783540573784
  • Publisher: Springer Berlin Heidelberg
  • Publication date: 12/20/1993
  • Series: Lecture Notes in Mathematics Series , #1560
  • Edition description: 1993
  • Edition number: 1
  • Pages: 158
  • Product dimensions: 6.14 (w) x 9.21 (h) x 0.36 (d)

Table of Contents

Category, genus and critical point theory with symmetries.- Category and genus of infinite-dimensional representation spheres.- The length of G-spaces.- The length of representation spheres.- The length and Conley index theory.- The exit-length.- Bifurcation for O(3)-equivariant problems.- Multiple periodic solutions near equilibria of symmetric Hamiltonian systems.

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