We consider a very general second order nonlinear parabolic boundary value problem. Assuming the existence of an upper solution . and a lower solution satisfying ., we show that the problem has extremal periodic solutions in the order interval K=[ , .]. Our proof is based on a general surjectivity
Multiple existence of periodic solutions for a nonlinear parabolic problem with singular nonlinearities
β Scribed by Norimichi Hirano; Wan Se Kim
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 146 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0362-546X
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β¦ Synopsis
In this paper, we establish a multiple existence result of periodic solutions for a nonlinear parabolic equations with singular nonlinearity at zero. To establish our result, We use an approximating process by smooth nonlinear functions to avoid a singularity in nonlinear term. And we adapt topological argument based on the variational structure of functionals corresponding to approximating equations.
π SIMILAR VOLUMES
In this paper we consider a nonlinear parabolic problem with a discontinuous, nonmonotone nonlinearity. We assume the existence of an upper solution and a lower solution such that F . Using results from the theory of pseudomonotone operators and from the theory of multivalued analysis together with