/* The NLS equation : */ /* number of independent variables: */ p : 2 $ /* number of dependent variables: */ q : 2 $ /* number of equations in the system: */ m : 2 $ parameters:[]$ sublisteqs:[all]$ info_given:false$ subst_deriv_of_vi:true$ highest_derivatives:all$ warnings:true$ e1 : u[1,[0,1]]+(u[1]^2+u[2]^2)*u[2]+u[2,[2,0]]; e2 : u[2,[0,1]]-(u[1]^2+u[2]^2)*u[1]-u[1,[2,0]]; v1 : u[1,[0,1]]; v2 : u[2,[0,1]];