Abstract:
We give a dispersionless Toda-like extension to the dispersionless Harry Dym
(dDym) hierarchy. The extended dDym (EdDym) hierarchy has
a dressing formulation, and its underlying solution structure can be
investigated through the twistor construction. We show that additional
symmetries of the solution space generate Bäcklund transformations of
the EdDym hierarchy. We present some examples of constructing new solutions of
the (2+1)-dimensional dDym and EdDym equations via Bäcklund
transformations.
Citation:
Yu.-T. Chen, J.-H. Chang, M. H. Tu, “Additional symmetries and Bäcklund transformations for the dispersionless Harry Dym hierarchy”, TMF, 152:1 (2007), 45–57; Theoret. and Math. Phys., 152:1 (2007), 915–925