Dynamics of logistic equations with non-autonomous bounded coefficients
Electronic journal of differential equations, Tome 2000 (2000)
We prove that the Verhulst logistic equation with positive non-autonomous bounded coefficients has exactly one bounded solution that is positive, and that does not approach the zero-solution in the past and in the future. We also show that this solution is an attractor for all positive solutions, some of which are shown to blow-up in finite time backward. Since the zero-solution is shown to be a repeller for all solutions that remain below the afore-mentioned one, we obtain an attractor-repeller pair, and hence (connecting) heteroclinic orbits. The almost-periodic attractor case is also discussed. Our techniques apply to the critical threshold-level equation as well.
Classification :
34C11, 34C27, 34C35, 34C37, 58F12, 92D25
Keywords: non-autonomous logistic equation, threshold-level equation, positive and bounded solutions, comparison techniques, $\omega$-limit points, maximal and minimal bounded solutions, almost-periodic functions, separated solutions
Keywords: non-autonomous logistic equation, threshold-level equation, positive and bounded solutions, comparison techniques, $\omega$-limit points, maximal and minimal bounded solutions, almost-periodic functions, separated solutions
@article{EJDE_2000__2000__a196,
author = {Nkashama, M.N.},
title = {Dynamics of logistic equations with non-autonomous bounded coefficients},
journal = {Electronic journal of differential equations},
year = {2000},
volume = {2000},
zbl = {0954.34028},
language = {en},
url = {http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a196/}
}
Nkashama, M.N. Dynamics of logistic equations with non-autonomous bounded coefficients. Electronic journal of differential equations, Tome 2000 (2000). http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a196/