N=2 and N=4 Supersymmetric mKdV and sinh-Gordon Hierarchies

H. Aratyn, J. F. Gomes, L. H. Ymai +1

Integrable models with higher N=2 and N=4 supersymmetries are formulated on reductions of twisted loop superalgebras $\widehat{sl}(2|2)$ and $\widehat{sl}(4|4)$ endowed with principal gra…