The notion of ball proximinality and the strong ball proximinality were recently introduced in [2]. We prove that spaces with strong 11/2 property are ball proximinal and in particular M-ideals are ball proximinal. We show that the problem of ball proximinality of hyperplanes is related to the problem of proximinality of certain convex sets determined by them.
机构:
North China Elect Power Univ, Sch Math & Phys, Baoding 071003, Peoples R ChinaNorth China Elect Power Univ, Sch Math & Phys, Baoding 071003, Peoples R China
Sun, Longfa
Sun, Yuqi
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机构:
Xiamen Univ, Sch Math Sci, Xiamen 361005, Peoples R ChinaNorth China Elect Power Univ, Sch Math & Phys, Baoding 071003, Peoples R China
Sun, Yuqi
Zhang, Wen
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机构:
Xiamen Univ, Sch Math Sci, Xiamen 361005, Peoples R ChinaNorth China Elect Power Univ, Sch Math & Phys, Baoding 071003, Peoples R China
Zhang, Wen
Zheng, Zheming
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机构:
Xiamen Univ, Sch Math Sci, Xiamen 361005, Peoples R ChinaNorth China Elect Power Univ, Sch Math & Phys, Baoding 071003, Peoples R China
Zheng, Zheming
HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS,
2021,
50
(03):
: 668
-
677
机构:
CRMEF, Rabat-Salé-Kénitra Avenue Allal El Fassi, Bab Madinat Al Irfane, RabatCRMEF, Rabat-Salé-Kénitra Avenue Allal El Fassi, Bab Madinat Al Irfane, Rabat
Chaira K.
Dovgoshey O.
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机构:
Institute of Applied Mathematics and Mechanics of the NAS of Ukraine, Sloviansk
Department of Mathematics and Statistics University of Turku, TurkuCRMEF, Rabat-Salé-Kénitra Avenue Allal El Fassi, Bab Madinat Al Irfane, Rabat