Displaying similar documents to “Topological degree for ultimately compact multivalued vector fields in topological vector spaces”

Topological degrees of set-valued compact fields in locally convex spaces

Tsoy-Wo Ma

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CONTENTSIntroduction................................................................................................................................................. 5I. General properties of set-valued compact fields............................................................................. 61. Upper semicontinuous maps............................................................................................................. 62. Generalization of Dugundji's extension theorem...............................................................................

Locally unbounded topological fields with topological nilpotents

J. E. Marcos (2002)

Fundamenta Mathematicae

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We construct some locally unbounded topological fields having topologically nilpotent elements; this answers a question of Heine. The underlying fields are subfields of fields of formal power series. In particular, we get a locally unbounded topological field for which the set of topologically nilpotent elements is an open additive subgroup. We also exhibit a complete locally unbounded topological field which is a topological extension of the field of p-adic numbers; this topological...

Topological and approximation methods of degree theory of set-valued maps

Wojciech Kryszewski

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SummaryThe theory of topological degree of set-valued maps determined by morphisms, i.e. maps with values which are continuous images of almost acyclic sets, is presented, together with some of its applications.In the first part, morphisms defined on finite-dimensional Euclidean manifolds are considered and the integer-valued degree is introduced by means of the Eilenberg-Montgomery-Górniewicz method based on the Vietoris-Begle-Sklyarenko theorem and using the approach of Dold in terms...