Definition
Given a dynamical system (T, M, Φ) with T a group, M a set and Φ the evolution function
- where
we define
then the set
is called orbit through x. An orbit which consists of a single point is called constant orbit. A non-constant orbit is called closed or periodic if there exists a t in T so that
for every point x on the orbit.
Read more about this topic: Orbit (dynamics)
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—Adrienne Rich (b. 1929)
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—The Columbia Encyclopedia, Fifth Edition, the first sentence of the article on “life” (based on wording in the First Edition, 1935)