We study the existence and multiplicity of positive solutions of the nonlinear fourth order problem ⎧ in (0,1), ⎨ ⎩u(0) = a ≥ 0, u’(0) = a’ ≥ 0, u(1) = b ≥ 0, u(1) = -b’ ≤ 0 The methods employed are upper and lower solutions and degree theory arguments.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-ap77-2-3,
author = {D. R. Dunninger},
title = {Multiplicity of positive solutions for a nonlinear fourth order equation},
journal = {Annales Polonici Mathematici},
volume = {77},
year = {2001},
pages = {161-168},
zbl = {0989.34014},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap77-2-3}
}
D. R. Dunninger. Multiplicity of positive solutions for a nonlinear fourth order equation. Annales Polonici Mathematici, Tome 77 (2001) pp. 161-168. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap77-2-3/