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Hopf bifurcation in a delayed Lotka-Volterra predator-prey system. (English) Zbl 1149.34048

The authors consider the following system of delay differential equations which describe the delayed predator-prey system \[ \begin{aligned}\dot{x}(t) & = x(t)[ r_1 - a_{11} x(t-\tau) - a_{12}y(t-\tau) ] ,\\ \dot{y}(t) & = y(t)[-r_2 +a_{21}x(t-\tau) - a_{22}y(t-\tau)], \end{aligned} \] where the scalar variables \(x\) and \(y\) can be interpreted as population densities of prey and predator, \(\tau>\) is the feedback time delay, \(r_1\) is the intrinsic growth rate of the prey and \(r_2\) denotes the death rate of the predator. The main results include the stability analysis of the zero equilibrium, conditions for Hopf bifurcations, direction of the Hopf bifurcations and analysis of the stability of the bifurcating periodic solutions.

MSC:

34K18 Bifurcation theory of functional-differential equations
34K13 Periodic solutions to functional-differential equations
34K17 Transformation and reduction of functional-differential equations and systems, normal forms
34K20 Stability theory of functional-differential equations
Full Text: DOI

References:

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