Input decoupling zeros (uncotrollable eigenvalues) of a State-Space System

Function the computes the input decoupling zeros, i.e. the uncontrollable eigenvalues of a system.

Function computes the input decoupling zeros of the state space system
x'(t)=Ax(t) + Bu(t)
y(t)=Cx(t)
i.e. the uncontrollable (non-stabilizable) eigenvalues, given the matrices A,B.