Ngā hua rapu - Leach, P.G.L.

Boussinesq equation FLRW spacetime Gauss-Bonnet cosmology K1-7720 Kelvin-Voigt equation Lagrange anchor Lie symmetries Lie symmetry Noether operator identity Noether operators Noether symmetries Noether symmetry approach Noether’s theorem action integral analytic mechanics approximate symmetry and solutions bic Book Industry Communication::L Law boundary term conservation law conservation laws continuous symmetry double dispersion equation energy-momentum tensor first integral first integrals generalized symmetry group-invariant solutions integrable nonlocal partial differential equations invariant invariant solutions