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Zbl 0993.34012
Drábek, Pavel; Girg, Petr; Roca, Francisco
Remarks on the range properties of certain semilinear problems of Landesman-Lazer type.
(English)
[J] J. Math. Anal. Appl. 257, No.1, 131-140 (2001). ISSN 0022-247X

The authors consider the Dirichlet problem $$u''(t)+ u(t)+ g(u'(t))= f(t),\quad u(0)= u(\pi)= 0.$$ It is assumed that $g$ is continuous, has finite limits $g(+\infty)$, $g(-\infty)$, and $g(-\infty)< g(s)< g(+\infty)$ for all $s$. The case of odd and increasing $g$ with some asymptotic conditions is dealt with in more detail. The structure of the set of continuous functions $f$ is studied for which the problem is solvable.
[Sergei A.Brykalov (Ekaterinburg)]
MSC 2000:
*34B15 Nonlinear boundary value problems of ODE

Keywords: Dirichlet problem; bounded nonlinearities

Cited in: Zbl 1032.34014

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