### Existence of multiple positive solutions for a nonlocal boundary value problem

DOI: http://dx.doi.org/10.12775/TMNA.2002.007

#### Abstract

Sufficient conditions are given for the existence of multiple positive solutions

of a boundary value problem of the form $x''(t)+q(t)f(x(t))=0$, $t\in [0,1]$, $x(0)=0$ and

$x(1)=\int_{\alpha}^{\beta}x(s)dg(s)$, where $0< \alpha < \beta < 1$. A weaker boundary value problem

is used to get information on the corresponding integral operator. Then the results follow by applying the

Krasnosel'skiĭ fixed point theorem on a suitable cone.

of a boundary value problem of the form $x''(t)+q(t)f(x(t))=0$, $t\in [0,1]$, $x(0)=0$ and

$x(1)=\int_{\alpha}^{\beta}x(s)dg(s)$, where $0< \alpha < \beta < 1$. A weaker boundary value problem

is used to get information on the corresponding integral operator. Then the results follow by applying the

Krasnosel'skiĭ fixed point theorem on a suitable cone.

#### Keywords

Nonlocal boundary value problems; multiple positive solutions; Krasnosel'skiĭ's fixed point theorem

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