To continue the discussion in (Ⅰ) and (Ⅱ),and finish the study of the limit cycle problem for quadratic system (Ⅲ)m=0 in this paper.Since there is at most on
The solvability of the fifth-order nonlinear dispersive equation (e)οtu+αu((e)οxu)2+β(e)ο3xu+γ(e)ο5xu=0 is studied.By using the approach of Kenig,Ponce a