Let X be a real Banach space and let D ; X be an open and bounded set. A Ž . mapping T : D ª X with 0 f T Ѩ D is called 0-epi mapping on D if the equation Ž . Tx s g x is solvable in D for every compact continuous mapping g: D ª X which vanishes identically on Ѩ D. We show that there exists a mappin
A Characterization of 0-epi Maps with a Degree
✍ Scribed by Elena Giorgieri; Martin Väth
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 174 KB
- Volume
- 187
- Category
- Article
- ISSN
- 0022-1236
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✦ Synopsis
The paper was written in the framework of a DFG project (Az. AP 40-15/1). The main ideas were discussed while the second author was invited professor at the University of Rome ''Tor Vergata.'' Financial support by the DFG and the CNR is gratefully acknowledged.
📜 SIMILAR VOLUMES
We show that in a large class of continuous operators on Jordan domains the 0-epi maps are precisely those maps with nonzero degree. The class contains in particular perturbations of the identity by countably 1/2-condensing operators. This implies that the example of Z.
Set-valued maps, absolute neighbourhood retracts, proximally oo-connected sets, fixed point index theory, approximation on the graph, odd mappings, degree theory \*The results in the paper are contained in the author's Ph.D. dissertation under supervisor Prof. H. Steinlein at the University of Munic