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Strong proximinality and renormings
Author(s):
Darapaneni
Narayana
Journal:
Proc. Amer. Math. Soc.
134
(2006),
1167-1172.
MSC (2000):
Primary 46B20
Posted:
October 25, 2005
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Abstract:
We characterize finite-dimensional normed linear
spaces as strongly
proximinal subspaces in all their superspaces.
A connection between
upper Hausdorff semi-continuity of metric projection
and finite
dimensionality of subspace is given.
References:
-
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- 2.
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- 3.
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- 5.
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- 6.
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fundamental and total biorthogonal sequences bounded by , Studia Math. 55 (1976), 295-304. MR 0425587 (54:13541) - 7.
- W. Pollul, Topologien auf Mengen von Teilmengen und Stetigkeit von mengenwertigen metrischen Projektionen, Diplomarbeit, Bonn, 1967.
- 8.
- W. Pollul, Reflexivität und existenz-teilräume in der linearen approximationstheorie, Dissertation, Bonn (1971), Schriften der Ges. für Math. und Datenverarbeitung, Bonn, 53 (1972), 3805-3807. MR 0445193 (56:3537)
- 9.
- Ivan Singer, On normed linear spaces which are proximinal in every superspace, J. Approx. Theory 7 (1973), 399-402. MR 0346397 (49:11122)
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Additional Information:
Darapaneni
Narayana
Affiliation:
Stat-Math Unit, Indian Statistical Institute, R. V. College P.O., Bangalore 560059, India
Address at time of publication:
Department of Mathematics, Indian Institute of Science, Bangalore 560012, India
Email:
dnarayana76@hotmail.com, narayana@math.iisc.ernet.in
DOI:
10.1090/S0002-9939-05-08151-7
PII:
S 0002-9939(05)08151-7
Keywords:
Strongly proximinal subspace,
reflexive space,
finite-dimensional space.
Received by editor(s):
August 2, 2004
Received by editor(s) in revised form:
November 11, 2004
Posted:
October 25, 2005
Communicated by:
Jonathan M. Borwein
Copyright of article:
Copyright
2005,
American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.
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