Jérôme Lohéac is a Senior Scientific Researcher at the Institut de Recherche en Communications et Cybernétique de Nantes, a scientific institution linked to the CNRS in France. His fields of research are Swimming of microorganisms(1); Time optimal control for PDEs(2); Optimal control of finite dimensional systems with state constraints(3) and Controllability of parameter-dependent systems(4). Author's contribution: Control of the semi-discrete 1D heat equation under nonnegative control constraint Using IpOpt to get the time-optimal nonnegative control of a semi-discrete 1D heat equation Authors: Jérôme Lohéac, Emmanuel Trélat, Enrique Zuazua - 05 March 2018 IpOpt and AMPL use to solve time optimal control problems How to use IpOpt to solve time optimal control problems Authors: Jérôme Lohéac, Emmanuel Trélat, Enrique Zuazua - 05 August 2017