Gauge Equivalence between Two-Dimensional Heisenberg Ferromagnets with   Single-Site Anisotropy and Zakharov Equations
  Gauge equivalence between the two-dimensional continuous classical Heisenberg ferromagnets(CCHF) of spin 1/2 - the M-I equation with single site anisotropy and the Zakharov equation(ZE) is established for the easy axis case. The anisotropic CCHF is shown to be gauge equivalent to the isotropic CCHF. 
R.Myrzakulov