Drinfeld-Sokolov hierarchies and diagram automorphisms of affine Kac-Moody algebras

Si-Qi Liu, Chao-Zhong Wu, Youjin Zhang +1

For a diagram automorphism of an affine Kac-Moody algebra such that the folded diagram is still an affine Dynkin diagram, we show that the associated Drinfeld-Sokolov hierarchy als…