Exponential separation and invariant bundles for maps in ordered Banach spaces with applications to parabolic equations Article

Received: 11 February 1992 DOI :
10.1007/BF01053163

Cite this article as: Poláčik, P. & Tereščák, I. J Dyn Diff Equat (1993) 5: 279. doi:10.1007/BF01053163
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Abstract A vector bundle morphism of a vector bundle with strongly ordered Banach spaces as fibers is studied. It is assumed that the fiber maps of this morphism are compact and strongly positive. The existence of two complementary, dimension-one and codimension-one, continuous subbundles invariant under the morphism is established. Each fiber of the first bundle is spanned by a positive vector (that is, a nonzero vector lying in the order cone), while the fibers of the other bundle do not contain a positive vector. Moreover, the ratio between the norms of the components (given by the splitting of the bundle) of iterated images of any vector in the bundle approaches zero exponentially (if the positive component is in the denominator). This is an extension of the Krein-Rutman theorem which deals with one compact strongly positive map only. The existence of invariant bundles with the above properties appears to be very useful in the investigation of asymptotic behavior of trajectories of strongly monotone discrete-time dynamical systems, as demonstrated by Poláčik and Tereščák (Arch. Ration. Math. Anal. 116 , 339–360, 1991) and Hess and Poláčik (preprint). The present paper also contains some new results on typical asymptotic behavior in scalar periodic parabolic equations.

Key words Vector bundle maps invariant subbundles exponential separation continuous separation positive operators strongly monotone dynamical systems periodic parabolic equations asymptotic behavior stable periodic solutions

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Authors and Affiliations 1. Center for Dynamical Systems and Nonlinear Studies Georgia Institute of Technology Atlanta 2. Institute of Applied Mathematics Comenius University Bratislava Czechoslovakia 3. Faculty of Mathematics and Physics Comenius University Bratislava Czechoslovakia