The L(sl2) symmetry of the Bazhanov-Stroganov model associated with the superintegrable chiral Potts model

The loop algebra L(sl2) symmetry is found in a sector of the nilpotent Bazhanov-Stroganov model. The Drinfeld polynomial of a L(sl2)-degenerate eigenspace of the model is equivalent to the polynomial which characterizes a subspace with the Ising-like spectrum of the superintegrable chiral Potts model.