Chia-Chiao (C.C.) Lin was an Institute Professor and applied mathematician “whose research initially concentrated on fluid mechanics, focusing on hydrodynamics stability and turbulence, and addressing the aerodynamics of gas turbines, oscillating airfoils and shock waves. His doctoral dissertation solved an outstanding problem, stemming from Werner Heisenberg’s work, concerning the stability of parallel flows. He also resolved a long-standing problem concerning the theory of asymptotic solutions of ordinary differential equations (of higher order than 2), which are uniformly valid around turning points.” Full text at MIT News