Now showing items 11-20 of 58
Group analysis of the Novikov equation
(Springer HeidelbergHeidelbergAlemanha, 2014)
Nonlinear Self-Adjoint Classification of a Burgers-KdV Family of Equations
(Hindawi Publishing CorporationNew YorkEUA, 2014)
Conservations laws for critical Kohn-Laplace equations on the Heisenberg group
(Atlantis PressParisFrança, 2008)
The construction of a Poisson structure out of a symmetry and a conservation law of a dynamical system
A method to construct Hamiltonian theories for systems of both ordinary and partial differential equations is presented. The knowledge of a Lagrangian is not at all necessary to achieve the result. The only ingredients ...
Invariant conserved currents in gravity theories with local Lorentz and diffeomorphism symmetry
We discuss conservation laws for gravity theories invariant under general coordinate and local Lorentz transformations. We demonstrate the possibility to formulate these conservation laws in many covariant and noncovariant(ly ...
Pohozhaev and Morawetz Identities in Elastostatics and Elastodynamics
(Natl Acad Sci Ukraine, Inst MathKyiv 4Ucrânia, 2011)
Invariant relationships deriving from classical scaling transformations
(American Institute of Physics, 2011)
Because scaling symmetries of the Euler–Lagrange equations are generally not variational symmetries of the action, they do not lead to conservation laws. Instead, an extension of Noether’s theorem reduces the equations ...