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Archive for Rational Mechanics and Analysis
Article . 1992 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 1992
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Dynamics of bifurcations for variational problems with o(3) equivariance: A conley index approach

Dynamics of bifurcations for variational problems with \(O(3)\) equivariance: A Conley index approach
Authors: Fiedler, Bernold; Mischaikow, Konstantin;

Dynamics of bifurcations for variational problems with o(3) equivariance: A conley index approach

Abstract

The paper investigates the nonlinear dynamics of symmetry breaking with orthogonal symmetry group \(O(3)\). A motivating example is the scalar reaction diffusion equation \(u_ t=\Delta u+\lambda f(u)\) on the 2- sphere; \(f(0)=0\), \(f'(0)=1\). Consider stationary bifurcation from the trivial solution, involving the seven-dimensional irreducible representation of \(SO(3)\) on spherical harmonics of order 3. As input information, use the known homology of the coset spaces \(O(3)/K\), where \(K\) denotes the isotropy subgroups of the three bifurcating stationary solution branches. Under nondegeneracy assumptions, the bifurcation directions then determine the unstable dimensions (Morse indices) of the bifurcating stationary solutions. Moreover, the heteroclinic connections between these equilibria are found. Going beyond the model example, the result is relevant even for non- variational \(O(3)\)-equivariant problems, since equivariant lowest order terms are automatically of variational type. The result is obtained via Conley index (generalized Morse theory) and the connection matrix. Therefore the result is persistent, even when breaking the equivariance of the system slightly.

Related Organizations
Keywords

heteroclinic orbits, orthogonal symmetry group \(O(3)\), stationary bifurcation, scalar reaction diffusion equation, Abstract critical point theory (Morse theory, Lyusternik-Shnirel'man theory, etc.) in infinite-dimensional spaces, Existence theories for optimal control problems involving partial differential equations, nonlinear dynamics of symmetry breaking, Variational problems in abstract bifurcation theory in infinite-dimensional spaces, Reaction-diffusion equations, Morse indices, Conley index

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
12
Average
Top 10%
Average
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