Geodesic
Singular Dirichlet problem for ordinary differential equations with $\phi$-Laplacian
Mathematica Bohemica, Tome 130 (2005) no. 4, pp. 409-425.

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We provide sufficient conditions for solvability of a singular Dirichlet boundary value problem with $$-Laplacian \[ \BOF\unknown. ((u^{\prime }))^{\prime } = f(t, u, u^{\prime }), u(0) = A, \ u(T) = B, \BOF\unknown. \] where $$ is an increasing homeomorphism, $(\mathbb{R})=\mathbb{R}$, $(0)=0$, $f$ satisfies the Carathéodory conditions on each set $[a, b]\times \mathbb{R}^{2}$ with $[a, b]\subset (0, T)$ and $f$ is not integrable on $[0, T]$ for some fixed values of its phase variables. We prove the existence of a solution which has continuous first derivative on $[0, T]$.
DOI : 10.21136/MB.2005.134206
Classification : 34B15, 34B16
Keywords: singular Dirichlet problem; $$-Laplacian; existence of smooth solution; lower and upper functions 
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Polášek, Vladimír; Rachůnková, Irena. Singular Dirichlet problem for ordinary differential equations with $\phi$-Laplacian. Mathematica Bohemica, Tome 130 (2005) no. 4, pp. 409-425. doi : 10.21136/MB.2005.134206. http://geodesic.mathdoc.fr/articles/10.21136/MB.2005.134206/

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