Peter Wittwer On the structure of stationary solutions of the Navier-Stokes equations (1088K, postscript) ABSTRACT. We consider stationary solutions of the incompressible Navier-Stokes equations in two dimensions. We give a detailed description of the fluid flow in a half-plane by using a mathematical setup within which the idea of a change of type from an elliptic to a parabolic partial differential equation can be made precise.