It has been shown that when an n-dimensional dynamical system admits a generalized symmetry vector field which Ε½ involves a divergence-free Liouville vector field, then it possesses n y 1 independent first integrals i.e., it is algebraically . integrable . Furthermore, the Liouville vector field can
Generating functions for dynamical systems with symmetries, integrals, and differential invariants
β Scribed by Robert I. McLachlan; G.R.W. Quispel
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 713 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0167-2789
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β¦ Synopsis
We give a survey and some new examples of generating functions for systems with symplectic structure, systems with a first integral, systems that preserve volume, and systems with symmetries and/or time-reversing symmetries. Both ODEs and maps are treated, and we discuss how generating functions may be used in the structure-preserving numerical integration of ODEs with the above properties.
π SIMILAR VOLUMES
In this paper we develop generalized Lyapunov and invariant set theorems for nonlinear dynamical systems wherein all regularity assumptions on the Lyapunov function and the system dynamics are removed. In particular, local and global stability theorems are given using lower semicontinuous Lyapunov f