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—7.997

Its eigenvalues are equal A12 = —0-0699 ± 0-4064i, A34 = —0-03 ± 0-6521i- Since RejA;} < 0, then we can say that the observed equilibrium is stable. Note that the knowledge of eigenvalues allows us to evaluate some dynamic characteristics of the system. For instance, the system could be oscillated with the periods of 10 and 16 years, but they are quickly damped (the decrements are equal to 33 and 14 years, correspondingly). Nevertheless, under certain conditions we may expect the appearance of resonance.

The sensitivity matrix S = 2A21 :

0:000

—223.1

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