The τ‐symmetries and Lie algebra structure of the Blaszak–Marciniak lattice equation.

A general approach is developed for discriminating strong and hereditary symmetric operators. The recursion operator of the Blaszak–Marciniak (BM) equation hierarchy is proved to be strong and hereditary symmetric. As an example of discrete soliton equations related to 3×3$$ 3\times 3 $$ matrix spectral problems, the τ$$ \tau $$‐symmetries and Lie algebra structure of the BM equation are built firstly. [ABSTRACT FROM AUTHOR]