Interpretation:
To show that for the given system, there is a trajectory connecting two saddle points. To sketch the phase portrait for the parameters equals to zero, less than zero, and greater than zero.
Concept Introduction:
A saddle point can be defined as a point on a graph that is neither a
Trajectory connecting two saddle points is called a saddle connection.
For non-zero value of parameter, phase portrait possesses different topological character in which saddle points are not connected by saddle connection.
A phase portrait’s topology can be structurally changed by an arbitrarily small perturbation parameter; such phase portraits are not structurally stable.
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Nonlinear Dynamics and Chaos
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