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      Best Approximation and Best Co-Approximation in Normed Space

      Abu Ghazal, Akran Mahmoud (الجامعة الإسلامية - غزة, 2009)
      In this thesis, the concept of best approximation and best co-approximation in normed linear spaces is studied. The concepts of ε-best approximation and ε-best co-approximation and ε-orthogonality are introduced and the ...