
doi: 10.1155/2014/482963
handle: 11012/137073
The paper deals with the local theory of internal symmetries of underdetermined systems of ordinary differential equations in full generality. The symmetries need not preserve the choice of the independent variable, the hierarchy of dependent variables, and the order of derivatives. Internal approach to the symmetries of one-dimensional constrained variational integrals is moreover proposed without the use of multipliers.
controllable differential equation, Geometric methods in ordinary differential equations, Symmetry of differential equation, Poincar\'e--Cartan form, higher--order transformation, Invariance and symmetry properties for PDEs on manifolds, QA1-939, general equivalence problem., variation, Symmetries, invariants of ordinary differential equations, diffiety, Mathematics, infinitesimal symmetry, constrained variational integral
controllable differential equation, Geometric methods in ordinary differential equations, Symmetry of differential equation, Poincar\'e--Cartan form, higher--order transformation, Invariance and symmetry properties for PDEs on manifolds, QA1-939, general equivalence problem., variation, Symmetries, invariants of ordinary differential equations, diffiety, Mathematics, infinitesimal symmetry, constrained variational integral
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