On fully-nonlinear symmetry-integrable equations with rational functions in their highest derivative: Recursion operators
arXiv:2211.06937 · doi:10.46298/ocnmp.10306
Abstract
We report a class of symmetry-intergable third-order evolution equations in 1+1 dimensions under the condition that the equations admit a second-order recursion operator that contains an adjoint symmetry (integrating factor) of order six. The recursion operators are given explicitly.