Dergiler / Hacettepe Journal of Mathematics and Statistics / 2026 / Volume: 43 Issue: 4

On the sum of best simultaneously proximinal subspaces

Mahmoud Rawashdeh(DEPARTMENT OF MATHEMATICS AND STATISTICS JORDAN UNIVERSITY OF SCIENCE AND TECHNOLOGY)
Sh. Al-sharif(DEPARTMENT OF MATHEMATICS, YARMOUK UNIVERSITY)
W.b. Domi(DEPARTMENT OF MATHEMATICS, YARMOUK UNIVERSITY)
Sayfa
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Yayın Tarihi
2014-08-01
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Some other related results are also presented.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Let X be a Banach space and G a subspace of X.
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Temel Bulgular & Veri:A point g0 ∈ G is said to be a best simultaneous approximation for a bounded set A ⊆ X if d(A, G) = inf g∈G sup a∈A ka − gk = sup a∈A ka − g0k.
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Sonuç & Katkı:Some other related results are also presented.
🔬Tür:Research Article
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Approximation · simultaneously

Abstract

Let X be a Banach space and G a subspace of X. A point g0 ∈ G is said to be a best simultaneous approximation for a bounded set A ⊆ X if d(A, G) = inf g∈G sup a∈A ka − gk = sup a∈A ka − g0k. In this paper we prove that if F and G are two subspaces of a Banach space X such that G is reflexive and F is simultaneously proximinal, then F + G is simultaneously proximinal provided that F ∩ G is finite dimensional and F + G is closed. Some other related results are also presented.

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Bu Makaleye Atıf Yap

Rawashdeh, M., Al-sharif, S., Domi, W. (2014). On the sum of best simultaneously proximinal subspaces. Hacettepe Journal of Mathematics and Statistics, Volume: 43 Issue: 4. https://ajindex.com/articles/1403387

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