Uniqueness of the norm preserving extension of a linear functional and the differentiability of the norm

碩士 === 國立中山大學 === 應用數學系研究所 === 94 === Let X be a Banach space and Y be a closed subspace of X. Given a bounded linear functional f on Y , the Hahn-Banach theorem guarantees that there exists a linear extension ˜ f 2 X of f which preserves the norm of f. But it does not state that such ˜ f is unique...

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Bibliographic Details
Main Authors: Ching-Jou Liao, 廖靜柔
Other Authors: Ngai-Ching Wong
Format: Others
Language:en_US
Published: 2006
Online Access:http://ndltd.ncl.edu.tw/handle/20530149361068383212