Abstract: 
Using the Fokas unified transform method the wellposedness of the initialboundary value problem of a system of KdV type equations on the halfline is studied for initial data in spatial Sobolev spaces and boundary data in the temporal Sobolev spaces suggested by the time regularity of the Cauchy problem for the corresponding linear system. First, linear estimates in Bourgain spaces are derived by utilizing the Fokas solution formula of the corresponding forced linear system. Then, using these and the needed bilinear estimates, it is shown that the iteration map defined by the Fokas solution formula is a contraction in an appropriate solution space. This talk is based on a joint work with Alex Himonas. 
