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2009, 2009(Special): 416-423. doi: 10.3934/proc.2009.2009.416

## Existence and nonexistence of positive solutions for a nonlinear fractional boundary value problem

 1 Department of Mathematics & Statistics, University of Arkansas at Little Rock, Little Rock, AR 72204, United States

Received  August 2008 Revised  May 2009 Published  September 2009

We give sufficient conditions on the value $\tau \in (0, T]$ such that the nonlinear fractional boundary value problem

$\D_0^\alpha + u(t) + f(t, u(t)) = 0,$   $t \in (0, \tau),$
$I^\gamma u(0^+) = 0,$   $I^\beta u(\tau) = 0,$

where $1 - \alpha < \gamma \leq 2 - \alpha,$ $2 - \alpha < \beta < 0$, $\D_(0+)^\alpha$ is the Riemann-Liouville differential operator of order $\alpha$, and $f \in C([0,T] \times \mathbb{R})$ is nonnegative, has a positive solution. We also present a nonexistence result.

Citation: Eric R. Kaufmann. Existence and nonexistence of positive solutions for a nonlinear fractional boundary value problem. Conference Publications, 2009, 2009 (Special) : 416-423. doi: 10.3934/proc.2009.2009.416
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