Yanqiong Lu
Abstract:
We obtain the existence and multiplicity of positive
-periodic solutions for the difference equations
and
where
may be singular at
.
Using a fixed point theorem in cones, we extend recent results
in the literature.
Submitted June 29, 2011. Published July 28, 2011.
Math Subject Classifications: 34G20.
Key Words: Positive periodic solutions; existence; nonexistence;
difference equations; fixed point.
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Yanqiong Lu Department of Mathematics Northwest Normal University Lanzhou, 730070, China email: linmu8610@163.com |
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