Discretion: Added catch for infinities
Comment: A user provided a file in which the Sylvester equation solved using doubling can evaluate to inf. When Doubling fails, one can try the Hessenberg-Schur algorithm.
Comment: A user provided a file in which the Sylvester equation solved using doubling can evaluate to inf. When Doubling fails, one can try the Hessenberg-Schur algorithm.