Article Contents
Article Contents

# Periodic and subharmonic solutions for duffing equation with a singularity

• This paper is devoted to the existence and multiplicity of periodic and subharmonic solutions for a superlinear Duffing equation with a singularity. In this manner, various preceding theorems are improved and sharpened. Our proof is based on a generalized version of the Poincaré-Birkhoff twist theorem.
Mathematics Subject Classification: 34C15, 34C25.

 Citation:

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