A simple proof of the Borel extension theorem and weak compactness of operators

Ivan Dobrakov; Thiruvaiyaru V. Panchapagesan

Czechoslovak Mathematical Journal (2002)

  • Volume: 52, Issue: 4, page 691-703
  • ISSN: 0011-4642

Abstract

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Let T be a locally compact Hausdorff space and let C 0 ( T ) be the Banach space of all complex valued continuous functions vanishing at infinity in T , provided with the supremum norm. Let X be a quasicomplete locally convex Hausdorff space. A simple proof of the theorem on regular Borel extension of X -valued σ -additive Baire measures on T is given, which is more natural and direct than the existing ones. Using this result the integral representation and weak compactness of a continuous linear map u C 0 ( T ) X when c 0 ¬ X are obtained. The proof of the latter result is independent of the use of powerful results such as Theorem 6 of [6] or Theorem 3 (vii) of [13].

How to cite

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Dobrakov, Ivan, and Panchapagesan, Thiruvaiyaru V.. "A simple proof of the Borel extension theorem and weak compactness of operators." Czechoslovak Mathematical Journal 52.4 (2002): 691-703. <http://eudml.org/doc/30735>.

@article{Dobrakov2002,
abstract = {Let $T$ be a locally compact Hausdorff space and let $C_0(T)$ be the Banach space of all complex valued continuous functions vanishing at infinity in $T$, provided with the supremum norm. Let $X$ be a quasicomplete locally convex Hausdorff space. A simple proof of the theorem on regular Borel extension of $X$-valued $\sigma $-additive Baire measures on $T$ is given, which is more natural and direct than the existing ones. Using this result the integral representation and weak compactness of a continuous linear map $u\: C_0(T) \rightarrow X$ when $c_0 \lnot \subset X$ are obtained. The proof of the latter result is independent of the use of powerful results such as Theorem 6 of [6] or Theorem 3 (vii) of [13].},
author = {Dobrakov, Ivan, Panchapagesan, Thiruvaiyaru V.},
journal = {Czechoslovak Mathematical Journal},
keywords = {weakly compact operator on $C_0(T)$; representing measure; lcHs-valued $\sigma $-additive Baire (or regular Borel; or regular $\sigma $-Borel) measures; weakly compact operator on ; representing measure; lcHs-valued -additive Baire measure; regular Borel measure; regular -Borel measure},
language = {eng},
number = {4},
pages = {691-703},
publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},
title = {A simple proof of the Borel extension theorem and weak compactness of operators},
url = {http://eudml.org/doc/30735},
volume = {52},
year = {2002},
}

TY - JOUR
AU - Dobrakov, Ivan
AU - Panchapagesan, Thiruvaiyaru V.
TI - A simple proof of the Borel extension theorem and weak compactness of operators
JO - Czechoslovak Mathematical Journal
PY - 2002
PB - Institute of Mathematics, Academy of Sciences of the Czech Republic
VL - 52
IS - 4
SP - 691
EP - 703
AB - Let $T$ be a locally compact Hausdorff space and let $C_0(T)$ be the Banach space of all complex valued continuous functions vanishing at infinity in $T$, provided with the supremum norm. Let $X$ be a quasicomplete locally convex Hausdorff space. A simple proof of the theorem on regular Borel extension of $X$-valued $\sigma $-additive Baire measures on $T$ is given, which is more natural and direct than the existing ones. Using this result the integral representation and weak compactness of a continuous linear map $u\: C_0(T) \rightarrow X$ when $c_0 \lnot \subset X$ are obtained. The proof of the latter result is independent of the use of powerful results such as Theorem 6 of [6] or Theorem 3 (vii) of [13].
LA - eng
KW - weakly compact operator on $C_0(T)$; representing measure; lcHs-valued $\sigma $-additive Baire (or regular Borel; or regular $\sigma $-Borel) measures; weakly compact operator on ; representing measure; lcHs-valued -additive Baire measure; regular Borel measure; regular -Borel measure
UR - http://eudml.org/doc/30735
ER -

References

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