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Continue to ChatRelative bases in Banach spaces - https://avesis.inonu.edu.tr/yayin/2ef91187-8972-400f-8649-0c17cbe9b0e9/relative-bases-in-banach-spaces
Relative bases in Banach spaces - https://avesis.inonu.edu.tr/yayin/2ef91187-8972-400f-8649-0c17cbe9b0e9/relative-bases-in-banach-spaces