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New Approximate Symmetry Theorems and Comparisons with Exact Symmetries
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Three new approximate symmetry theories are proposed. The approximate symmetries are contrasted with each other and with the exact symmetries. The theories are applied to nonlinear ordinary differential equations for which exact solutions are available. It is shown that from the symmetries, approximate solutions as well as exact solutions in some restricted cases can be retrieved. Depending on the specific approximate theory and the equations considered, the approximate symmetries may expand the Lie Algebra of the exact symmetries, may be a perturbed form of the exact symmetries, or may be a subalgebra of the exact symmetries. Exact and approximate solutions are retrieved using the symmetries.
Title: New Approximate Symmetry Theorems and Comparisons with Exact Symmetries
Description:
Three new approximate symmetry theories are proposed.
The approximate symmetries are contrasted with each other and with the exact symmetries.
The theories are applied to nonlinear ordinary differential equations for which exact solutions are available.
It is shown that from the symmetries, approximate solutions as well as exact solutions in some restricted cases can be retrieved.
Depending on the specific approximate theory and the equations considered, the approximate symmetries may expand the Lie Algebra of the exact symmetries, may be a perturbed form of the exact symmetries, or may be a subalgebra of the exact symmetries.
Exact and approximate solutions are retrieved using the symmetries.
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