Multiplicity of positive solutions for a nonlinear differential equation with nonlinear boundary conditions

Volume 69 / 1998

D. R., Haiyan Wang Annales Polonici Mathematici 69 (1998), 155-165 DOI: 10.4064/ap-69-2-155-165


We study the existence and multiplicity of positive solutions of the nonlinear equation u''(x) + λh(x)f(u(x)) = 0 subject to nonlinear boundary conditions. The method of upper and lower solutions and degree theory arguments are used.


  • D. R.
  • Haiyan Wang

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