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Other literature type . 1996
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Topological Methods in Nonlinear Analysis
Article . 1996 . Peer-reviewed
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On the homotopy type of VMO

Authors: ABBONDANDOLO, ALBERTO;

On the homotopy type of VMO

Abstract

Let \(X\) and \(Y\) be compact smooth manifolds without boundary. By \(\text{VMO} (X,Y)\) (vanishing mean oscillation) is understood the class of maps from \(X\) to \(Y\) introduced by \textit{H. Brezis} and \textit{L. Nirenberg} in their paper [Sele. Math., New Ser. 1, 197-263 (1995; Zbl 0852.58010)]. The set \(\text{VMO} (X,Y)\) is equipped with a metric paracompact topology and contains the space \(C(X,Y)\) as a proper dense subset. The author proves that the inclusion map \(i: C(X,Y)\hookrightarrow \text{VMO} (X,Y)\) is a homotopy equivalence. Combining this with a well-known theorem of Whitney asserting that the inclusion \(C^k(X,Y) \hookrightarrow C(X,Y)\) is a homotopy equivalence for \(1\leq k\leq\infty\), he obtains the, following sequence of homotopy equivalences: \[ C^\infty(X,Y) \hookrightarrow C^k(X,Y) \hookrightarrow\cdots C^1(X,Y) \hookrightarrow C(X,Y) \hookrightarrow \text{VMO}(X,Y). \] This implies that all the homotopy, homology and cohomology groups of \(\text{VMO} (X,Y)\) are isomorphic via the homomorphisms induced by inclusion to the corresponding groups of \(C^\infty(X,Y)\).

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Italy
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Keywords

metric paracompact topology, vanishing mean oscillation, homotopy equivalence, compact smooth manifolds without boundary, Sobolev spaces and other spaces of ``smooth'' functions, embedding theorems, trace theorems, homotopy, homology and cohomology groups, Integration on manifolds; measures on manifolds, Embedding

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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