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Phase space of a dynamic system with focal instability, showing one phase space trajectory

In mathematics and physics, a phase space of a dynamical system is a space in which all possible states of a system are represented, with each possible state of the system corresponding to one unique point in the phase space. For mechanical systems, the phase space usually consists of all possible values of position and momentum variables. The concept of phase space was developed in the late 19th century by Ludwig Boltzmann, Henri Poincaré, and Willard Gibbs.<ref>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref>


Phase space sections
Intro  Introduction   Examples   Phase plot  Quantum mechanics  Thermodynamics and statistical mechanics   Phase Integral   See also   References   External links  

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