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Control theory - eigenvalues and characteristic equation

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dqhuy

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Control system:
dX/dt= A.X+Bu
y=CX+Du
or W(s)=NUM(s)/DEN(s)


Can anybody help me improve that eigenvalues of matrix A are roots of characteristic equation DEN(s)=0
 

det(sI-A) will coincide with that denominator.
 

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