A solution of the unit circle problem via Schwarz canonical form
Biswa Nath Datta · IEEE Transactions on Automatic Control · 1982
The unit circle problem is the problem of finding the number of eigenvalues of a matrixAinside and outside the unit circle. It is associated with stability analysis of the systemx_{k+1} = Ax_{k}. An algorithm is developed in this paper to solve the problem via Schwarz canonical form.