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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 38 (1987), S. 151-171 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Für Systeme der Form $$\dot x$$ =Ax +F 1 (x, y, z), $$\dot y$$ =By +F 2 (x, y,z), $$\dot z$$ =Cz +F 3 (x, y, z) mitP = {(0,0,z)} als invarianter Mannigfaltigkeit geben wir Bedingungen an, unter welchen sichP zu einer invarianten Mannigfaltigkeit der Form (x, s (x, z), z) fortsetzen läßt. Wir gehen stets davon aus, daß das Spektrum σ A vonA links und das Spektrum σ B vonB rechts einer vertikalen Geradenl in ℂ liegen. Eine derartige Fortsetzung vonP ist einfach, falls das Spektrum σ C vonC ebenfalls links vonl liegt. Wir untersuchen den Fall, in welchem σ A ∪ σ C sich nicht durch eine vertikale Gerade von σ B trennen läßt.
    Notes: Abstract For systems of the form $$\dot x$$ =Ax +F 1 (x, y, z), $$\dot y$$ =By +F 2 (x, y,z), $$\dot z$$ =Cz +F 3 (x, y, z) possessingP = {(0,0,z)} as invariant manifold we present sufficient conditions for the extension ofP to an invariant manifold of the form (x, s (x, z), z). Hereby we assume that the spectrum σ A ofA is located to the left and the spectrum σ b ofB to the right of a vertical straight linel in ℂ. In the case where the spectrum σ C ofC lies to the left ofl too such an extension ofP is rather simple. We consider the situation where σ A ∪ σ C cannot be separated from σ B by a vertical line in ℂ.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 39 (1988), S. 954-958 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of mathematical biology 27 (1989), S. 223-231 
    ISSN: 1432-1416
    Keywords: Hypercycle ; α-Limit sets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract For homogeneous hypercycles with 2, 3 or 4 substances the future behavior of its trajectories is easily understood, in fact any trajectory converges to an equilibrium point as t → +∞. In this paper we study the descent of the trajectories, i.e. their behavior as t → -∞. It turns out that this backward behavior is not as uniform as the forward behavior. In fact, depending on the initial points some α-limit sets are singletons while others consist of certain edges of the state simplex.
    Type of Medium: Electronic Resource
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