AEAAD0D9-87BC-425C-B873-4977F1547FF4Fast Solvers for Real-World PDE-Constrained OptimizationFellowshipEP/M018857/2798CB33D-C79E-4578-83F2-72606407192CEPSRCINCOME_ACTUAL74850B5D70957-524E-4B8A-A770-5D879DC50AEDA rational deferred correction approach to parabolic optimal control problemsIMA Journal of Numerical Analysis39066504eaed1e9fa35a12637ce509a9Güttel S2018-01-01http://dx.doi.org/10.1093/imanum/drx046http://dx.doi.org/10.1093/imanum/drx0464Journal Article/Review5c474ca8085f81.22672874