Integrability of a nonlinear evolution equation derived from   isoperimetric plane curve motion
  We provide a geometrical interpretation for the series of transformations used by Sakovich to map the third-order nonlinear evolution equation obtained by Chou and Qu to the mKdV equation. We also discuss its bi-Hamiltonian integrability as well as integrable equations associated with this system. 
Jose Carlos Brunelli
nlin.SI