To compute the zeros of large systems
K.E. Bollinger, Jyortirmay Mathur · IEEE Transactions on Automatic Control · 1971
A numerical method is derived to determine the zeros of transfer functions relating any two variables or set of variables of single-variable or multivariable control systems. The zeros of the system associated with an n th-order system are determined by calculating the eigenvalues of a matrix of an order less than the order of the system.