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  2. Lyapunov exponent - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_exponent

    Lyapunov proved that if the system of the first approximation is regular (e.g., all systems with constant and periodic coefficients are regular) and its largest Lyapunov exponent is negative, then the solution of the original system is asymptotically Lyapunov stable. Later, it was stated by O. Perron that the requirement of regularity of the ...

  3. Oseledets theorem - Wikipedia

    en.wikipedia.org/wiki/Oseledets_theorem

    In mathematics, the multiplicative ergodic theorem, or Oseledets theorem provides the theoretical background for computation of Lyapunov exponents of a nonlinear dynamical system. It was proved by Valery Oseledets (also spelled "Oseledec") in 1965 and reported at the International Mathematical Congress in Moscow in 1966.

  4. Aleksandr Lyapunov - Wikipedia

    en.wikipedia.org/wiki/Aleksandr_Lyapunov

    Lyapunov stability Lyapunov exponent Lyapunov central limit theorem Lyapunov vector Qualitative theory of differential equations: Scientific career: Fields: Applied mathematics: Institutions: Saint Petersburg State University Russian Academy of Sciences Kharkov University: Thesis: The general problem of the stability of motion (1892) Doctoral ...

  5. Lyapunov stability - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_stability

    The mathematical theory of stability of motion, founded by A. M. Lyapunov, considerably anticipated the time for its implementation in science and technology. Moreover Lyapunov did not himself make application in this field, his own interest being in the stability of rotating fluid masses with astronomical application.

  6. Floquet theory - Wikipedia

    en.wikipedia.org/wiki/Floquet_theory

    The real parts of the Floquet exponents are called Lyapunov exponents. The zero solution is asymptotically stable if all Lyapunov exponents are negative, Lyapunov stable if the Lyapunov exponents are nonpositive and unstable otherwise. Floquet theory is very important for the study of dynamical systems, such as the Mathieu equation.

  7. Lyapunov function - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_function

    In the theory of ordinary differential equations (ODEs), Lyapunov functions, named after Aleksandr Lyapunov, are scalar functions that may be used to prove the stability of an equilibrium of an ODE. Lyapunov functions (also called Lyapunov’s second method for stability) are important to stability theory of dynamical systems and control theory .

  8. Chaos theory - Wikipedia

    en.wikipedia.org/wiki/Chaos_theory

    The rate of separation depends on the orientation of the initial separation vector, so a whole spectrum of Lyapunov exponents can exist. The number of Lyapunov exponents is equal to the number of dimensions of the phase space, though it is common to just refer to the largest one. For example, the maximal Lyapunov exponent (MLE) is most often ...

  9. Dynamical billiards - Wikipedia

    en.wikipedia.org/wiki/Dynamical_billiards

    The study of billiards which are kept out of a region, rather than being kept in a region, is known as outer billiard theory. The motion of the particle in the billiard is a straight line, with constant energy, between reflections with the boundary (a geodesic if the Riemannian metric of the billiard table is not flat).

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