Oscillations and global attractivity in a discrete delay logistic model

Author:

Kuruklis S. A.,Ladas G.

Abstract

Consider the discrete delay logistic model \[ N t + 1 = α N t 1 + β N t k , ( 1 ) {N_{t + 1}} = \frac {{\alpha {N_t}}}{{1 + \beta {N_{t - k}}}}, \qquad \left ( 1 \right ) \] where α ( 1 , ) , β ( 0 , ) \alpha \in \left ( {1, \infty } \right ), \beta \in \left ( {0, \infty } \right ) , and k N = { 0 , 1 , 2 , . . . } k \in \mathbb {N} = \left \{{0, 1, 2,...} \right \} . We obtain conditions for the oscillation and asymptotic stability of all positive solutions of Eq. (1) about its positive equilibrium ( α 1 ) / β \left ( {\alpha - 1} \right )/\beta . We prove that all positive solutions of Eq. (1) are bounded and that for k = 0 k = 0 and k = 1 k = 1 the positive equilibrium ( α 1 ) / β \left ( {\alpha - 1} \right )/\beta is a global attractor.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics

Reference9 articles.

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