1111.5796 (Petr Vojcak)

On nonlocal symmetries for the Krichever--Novikov equation    [PDF]

Petr Vojcak

We construct new infinite hierarchies of nonlocal symmetries and cosymmetries
for the Krichever--Novikov equation using the inverse of the fourth-order
recursion operator of the latter.

View original: http://arxiv.org/abs/1111.5796