## Multiplicity results for singular conjugate, focal, and $$(N,P)$$ problems.(English)Zbl 0978.34018

Existence and multiplicity results for a rather general class of singular boundary value problems, characterized by the title, are obtained. The singularity may occur in both time and/or space variables. The applied technique is based on the Krasnosel’skij fixed-point theorem in a cone.

### MSC:

 34B16 Singular nonlinear boundary value problems for ordinary differential equations 34B15 Nonlinear boundary value problems for ordinary differential equations

### Keywords:

existence; multiplicity; singular boundary value problems
Full Text:

### References:

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