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2. Lyapunov equation - Wikipedia

   en.wikipedia.org/wiki/Lyapunov_equation

   In particular, the discrete-time Lyapunov equation (also known as Stein equation) for is A X A H − X + Q = 0 {\displaystyle AXA^{H}-X+Q=0} where Q {\displaystyle Q} is a Hermitian matrix and A H {\displaystyle A^{H}} is the conjugate transpose of A {\displaystyle A} , while the continuous-time Lyapunov equation is

3. Lyapunov function - Wikipedia

   en.wikipedia.org/wiki/Lyapunov_function

   A Lyapunov function for an autonomous dynamical system {: ˙ = ()with an equilibrium point at = is a scalar function: that is continuous, has continuous first derivatives, is strictly positive for , and for which the time derivative ˙ = is non positive (these conditions are required on some region containing the origin).

4. Lyapunov theorem - Wikipedia

   en.wikipedia.org/wiki/Lyapunov_theorem

   Lyapunov theory, a theorem related to the stability of solutions of differential equations near a point of equilibrium; Lyapunov central limit theorem, variant of the central limit theorem; Lyapunov vector-measure theorem, theorem in measure theory that the range of any real-valued, non-atomic vector measure is compact and convex

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. Lyapunov–Malkin theorem - Wikipedia

   en.wikipedia.org/wiki/Lyapunov–Malkin_theorem

   The figure below shows a plot of this vector field along with some trajectories that pass near (0,0). As expected by the theorem, it can be seen that trajectories in the neighborhood of (0,0) converges to a point in the form (0,c).

7. Input-to-state stability - Wikipedia

   en.wikipedia.org/wiki/Input-to-state_stability

   ISS unified the Lyapunov and input-output stability theories and revolutionized our view on stabilization of nonlinear systems, design of robust nonlinear observers, stability of nonlinear interconnected control systems, nonlinear detectability theory, and supervisory adaptive control. This made ISS the dominating stability paradigm in ...

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9. Control-Lyapunov function - Wikipedia

   en.wikipedia.org/wiki/Control-Lyapunov_function

   The ordinary Lyapunov function is used to test whether a dynamical system is (Lyapunov) stable or (more restrictively) asymptotically stable. Lyapunov stability means that if the system starts in a state x ≠ 0 {\displaystyle x\neq 0} in some domain D , then the state will remain in D for all time.