Lie group analysis of Poisson's equation and optimal system of subalgebras for Lie algebra of $3-$dimensional rigid motions

Details Lie group analysis of Poisson's equation and optimal system of subalgebras for Lie algebra of $3-$dimensional rigid motions Lie group analysis of Poisson's equation and optimal system of subalgebras for Lie algebra of $3-$dimensional rigid motions

2009-08-25

arxiv.org/abs/0908.3619v1

Mathematics

Analysis of PDEs

7 pages

Scientific paper

Using the basic Lie symmetry method, we find the most general Lie point symmetries group of the $\nabla u=f(u)$ Poisson's equation, which has a subalgebra isomorphic to the $3-$dimensional special Euclidean group ${\rm SE}(3)$ or group of rigid motions of ${\Bbb R}^3$. Looking the adjoint representation of ${\rm SE}(3)$ on its Lie algebra $\goth{se}(3)$, we will find the complete optimal system of its subalgebras. This latter provides some properties of solutions for the Poisson's equation.

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