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  2. Lyapunov time - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_time

    The Lyapunov time mirrors the limits of the predictability of the system. By convention, it is defined as the time for the distance between nearby trajectories of the system to increase by a factor of e. However, measures in terms of 2-foldings and 10-foldings are sometimes found, since they correspond to the loss of one bit of information or ...

  3. Lyapunov exponent - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_exponent

    There are no inherent limitations on the number of variables, parameters etc. Lyap which includes source code written in Fortran, can also calculate the Lyapunov direction vectors and can characterize the singularity of the attractor, which is the main reason for difficulties in calculating the more negative exponents from time series data.

  4. Lyapunov theorem - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_theorem

    Lyapunov fractal, bifurcational fractals derived from an extension of the logistic map in which the degree of the growth of the population periodically switches between two values; Lyapunov time, characteristic timescale on which a dynamical system is chaotic; Probability theory, the branch of mathematics concerned with probability

  5. Lyapunov optimization - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_optimization

    Lyapunov functions are used extensively in control theory to ensure different forms of system stability. The state of a system at a particular time is often described by a multi-dimensional vector. A Lyapunov function is a nonnegative scalar measure of this multi-dimensional state.

  6. Controllability Gramian - Wikipedia

    en.wikipedia.org/wiki/Controllability_Gramian

    Linear Time Invariant (LTI) Systems are those systems in which the parameters , , and are invariant with respect to time.. One can observe if the LTI system is or is not controllable simply by looking at the pair (,).

  7. Stability of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Stability_of_the_Solar_System

    The planets' orbits are chaotic over longer time scales, in such a way that the whole Solar System possesses a Lyapunov time in the range of 2~230 million years. [3] In all cases, this means that the positions of individual planets along their orbits ultimately become impossible to predict with any certainty.

  8. After seven years as a judge on American Idol, it's Katy Perry's turn to face feedback — and her latest critic isn't holding back.. Over the weekend, musician Steven James shared his reaction to ...

  9. Lyapunov dimension - Wikipedia

    en.wikipedia.org/wiki/Lyapunov_dimension

    The concept of finite-time Lyapunov dimension and related definition of the Lyapunov dimension, developed in the works by N. Kuznetsov, [4] [5] is convenient for the numerical experiments where only finite time can be observed. Consider an analog of the Kaplan–Yorke formula for the finite-time Lyapunov exponents: