# American Institute of Mathematical Sciences

July  2009, 25(2): 467-479. doi: 10.3934/dcds.2009.25.467

## The approximate fixed point property in Hausdorff topological vector spaces and applications

 1 Departamento de Matemática, Universidade Federal do Ceará, Fortaleza, 60455-760, CE, Brazil

Received  October 2008 Revised  February 2009 Published  June 2009

Let l be a compact convex subset of a Hausdorff topological vector space $(\mathcal{E},\tau)$ and $\sigma$ another Hausdorff vector topology in $\mathcal{E}$. We establish an approximate fixed point result for sequentially continuous maps f: (l,$\sigma$)$\to$ (l,$\tau$). As application, we obtain the weak-approximate fixed point property for demicontinuous self-mapping weakly compact convex sets in general Banach spaces and use this to prove new results in asymptotic fixed point theory. These results are also applied to study the existence of limiting-weak solutions for differential equations in reflexive Banach spaces.
Citation: Cleon S. Barroso. The approximate fixed point property in Hausdorff topological vector spaces and applications. Discrete and Continuous Dynamical Systems, 2009, 25 (2) : 467-479. doi: 10.3934/dcds.2009.25.467
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