Existence and nonexistence of entire solutions to the logistic differential equation
Ghergu, Marius ; Rădulescu, Vicenţiu
Abstr. Appl. Anal., Tome 2003 (2003) no. 7, p. 995-1003 / Harvested from Project Euclid
We consider the one-dimensional logistic problem $(r^{\alpha}A(|u'|)u')'= r^{\alpha}p(r)f(u)$ on $(0,\infty)$ , $u(0)>0$ , $u'(0)=0$ , where $\alpha$ is a positive constant and $A$ is a continuous function such that the mapping $tA(|t|)$ is increasing on $(0,\infty)$ . The framework includes the case where $f$ and $p$ are continuous and positive on $(0,\infty)$ , $f(0)=0$ , and $f$ is nondecreasing. Our first purpose is to establish a general nonexistence result for this problem. Then we consider the case of solutions that blow up at infinity and we prove several existence and nonexistence results depending on the growth of $p$ and $A$ . As a consequence, we deduce that the mean curvature inequality problem on the whole space does not have nonnegative solutions, excepting the trivial one.
Publié le : 2003-11-06
Classification:  26D10,  34A34,  34B18,  34D05,  35B40
@article{1068472883,
     author = {Ghergu, Marius and R\u adulescu, Vicen\c tiu},
     title = {Existence and nonexistence of entire solutions
to the logistic differential equation},
     journal = {Abstr. Appl. Anal.},
     volume = {2003},
     number = {7},
     year = {2003},
     pages = { 995-1003},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1068472883}
}
Ghergu, Marius; Rădulescu, Vicenţiu. Existence and nonexistence of entire solutions
to the logistic differential equation. Abstr. Appl. Anal., Tome 2003 (2003) no. 7, pp.  995-1003. http://gdmltest.u-ga.fr/item/1068472883/