Invariant subspaces and conditional Lie-Bcklund symmetries of the Hamilton-Jacobi equation
DONG Yaying1, QU Gaizhu1,2
(1 School of Mathematics,Northwest University,Xi′an 710127, Shaanxi, China;2 College of Mathematics and Information Science,Weinan Normal University,Weinan 714000, Shaanxi, China)
Abstract:
Invariant subspace (IS) method and conditional Lie-Bcklund symmetry (CLBS) are used to study the Hamilton-Jacobi equation.It is proved that the equations admit a class of invariant subspaces,which is equivalent to a kind of higher-order conditional Lie-Bcklund symmetries of the equations. As a consequence, some examples are given and the generalized functional separable solutions to the Hamilton-Jacobi equation are constructed explicitly.
KeyWords:
Hamilton-Jacobi equation; invariant subspace;conditional Lie-Bcklund symmetry; generalized functional separable solution