Found 14 Documents (Results 1–14)
Lie group analysis and conservation laws for the time-fractional third order KdV-type equation with a small perturbation parameter. (English) Zbl 1448.76118
The approximate Noether symmetries and approximate first integrals for the approximate Hamiltonian systems. (English) Zbl 1468.37026
Approximate symmetries, conservation laws and numerical solutions for a class of perturbed linear wave type system. (English) Zbl 1427.76197
Perturbative manifolds and the Noether generators of \(n\)th-order Poisson equations. (English) Zbl 1410.76399
Reviewer: Alain Brillard (Riedisheim)
Approximate conditions admitted by classes of the Lagrangian \(\mathcal{L} = \frac{1}{2}(- u^{\prime 2} + u^2) + \epsilon^i g_i(u, u^\prime, u'')\). (English) Zbl 1427.35003
Approximate Noether symmetries from geodetic Lagrangian for plane symmetric spacetimes. (English) Zbl 1331.83006
Classification of cosmic scale factor via Noether gauge symmetries. (English) Zbl 1327.83084
MSC:
83C20
Approximate Noether symmetries of the geodesic equations for the charged-Kerr spacetime and rescaling of energy. (English) Zbl 1176.83027
Approximate symmetries and conservation laws of the geodesic equations for the Schwarzschild metric. (English) Zbl 1173.83007
On approximate Lagrangians and invariants for scaling reductions of a non-linear wave equation with damping. (English) Zbl 1157.65454
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