Lie group foliations: Dynamical systems and integrators

Details Lie group foliations: Dynamical systems and integrators Lie group foliations: Dynamical systems and integrators

2002-09-27

arxiv.org/abs/math/0209387v1

Mathematics

Numerical Analysis

20 pages

Scientific paper

Foliate systems are those which preserve some (possibly singular) foliation of phase space, such as systems with integrals, systems with continuous symmetries, and skew product systems. We study numerical integrators which also preserve the foliation. The case in which the foliation is given by the orbits of an action of a Lie group has a particularly nice structure, which we study in detail, giving conditions under which all foliate vector fields can be written as the sum of a vector field tangent to the orbits and a vector field invariant under the group action. This allows the application of many techniques of geometric integration, including splitting methods and Lie group integrators.

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