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Difference between revisions of "Poisson manifold"

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== Poisson manifold ==
 
== Poisson manifold ==
  
A '''Poisson bracket''' on a smooth manifold $M$ is a Lie bracket $\{~,~\}$ on the space of smooth functions $C^\infty(M)$ which, additionally, satisfies the Leibniz identity:
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A '''Poisson bracket''' on a smooth manifold $M$ is a [[Lie bracket]] $\{~,~\}$ on the space of smooth functions $C^\infty(M)$ which, additionally, satisfies the Leibniz identity:
 
$$ \{f,gh\}=\{f,g\}h+g\{f,h\},\qquad \forall f,g,h\in C^\infty(M).$$
 
$$ \{f,gh\}=\{f,g\}h+g\{f,h\},\qquad \forall f,g,h\in C^\infty(M).$$
 
The pair $(M,\{~,~\})$ is called a '''Poisson manifold'''. Examples of Poisson manifolds inlcude [[Symplectic manifold|symplectic manifolds]] and [[Poisson Lie group|Poisson Lie groups]].
 
The pair $(M,\{~,~\})$ is called a '''Poisson manifold'''. Examples of Poisson manifolds inlcude [[Symplectic manifold|symplectic manifolds]] and [[Poisson Lie group|Poisson Lie groups]].

Revision as of 09:55, 30 August 2011

Poisson manifold

A Poisson bracket on a smooth manifold $M$ is a Lie bracket $\{~,~\}$ on the space of smooth functions $C^\infty(M)$ which, additionally, satisfies the Leibniz identity: $$ \{f,gh\}=\{f,g\}h+g\{f,h\},\qquad \forall f,g,h\in C^\infty(M).$$ The pair $(M,\{~,~\})$ is called a Poisson manifold. Examples of Poisson manifolds inlcude symplectic manifolds and Poisson Lie groups.

On a Poisson manifold $(M,\{~,~\})$, any smooth function $h\in C^\infty(M)$ determines a hamiltonian vector field $X_h$ by setting: $$ X_h(f):=\{h,f\}.$$

How to Cite This Entry:
Poisson manifold. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Poisson_manifold&oldid=19522