algebraic Riccati equatoin

Code for the paper : Behr, Benner, Heiland Invariant Galerkin Ansatz Spaces and Davison-Maki Methods for the Numerical Solution of Differential Riccati Equations

Code for the preprint : Behr, Benner, Heiland Invariant Galerkin Ansatz Spaces and Davison-Maki Methods for the Numerical Solution of Differential Riccati Equations