S. Richter et al., HOMOTOPY METHODS FOR THE SOLUTION OF GENERAL MODIFIED ALGEBRAIC RICCATI-EQUATIONS, IEE proceedings. Part D. Control theory and applications, 140(6), 1993, pp. 449-454
In the paper, the authors present a method for the numerical solution
of modified algebraic Riccati equations, A(T)Q + QA - Q(SIGMA)Q + V F(Q) = 0, where the perturbation term F is low rank. They use a contin
uous homotopy approach with discrete corrections at each homotopy step
. Their algorithm requires the solution of several perturbed Lyapunov
equations during each iteration; thus they also address the rapid solu
tion of sets of perturbed Lyapunov equations.