The self-adjoint sub-classes of nonlinear evolution equations of fourth-order with time dependent coefficients are determined, generalizing some recent results. Using the new conservation theorem recently proved by Nail Ibragimov some conservation laws for time dependent equations are established illustrating the main results.
Lie symmetries, Kac-Moody-Virasoro algebras and integrability of certain (2+1)-dimensional nonlinear evolution equations
On the exact calculation of travelling wave solutions to nonlinear evolution equations
Time-dependent polynomials with one double root, and related new solvable systems of nonlinear evolution equations
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