  In a series of fundamental papers BK Ghosh reduced the simultaneous
stabilization problem to a NevanlinnaPick interpolation problem. In this paper
we generalize some of these results allowing for derivative constraints.
Moreover, we apply a method based on a Riccati-type matrix equation, called the
Covariance Extension Equation, which provides a parameterization of all
solutions in terms of a monic Schur polynomial. The procedure is illustrated by
examples.
