Based on a continuation principle, we give some existence results of solutions for the nonlinear problem
(ϕ(u′))′=f(t,u),(ϕ(u′))′=f(t,u),
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View the MathML sourceu(0)=u(T),u′(0)=u′(T)
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involving singular vector ϕϕ-Laplacian with View the MathML sourceϕ:B(a)→RN(0
Keywords :
Hartman-type condition , Singular vector ??-Laplacian , Continuation lemma , Nonlinear system