Let M be a finite-dimensional subspace of the normed space X. If x + Me X/M, show that there exists an element y = x + M such that ||y|| = ||x + M||.

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Chapter4: Vector Spaces
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Let M be a finite-dimensional subspace of the normed space X. If x + Me X/M,
show that there exists an element y = x + M such that ||y|| = ||x + M||.
Transcribed Image Text:Let M be a finite-dimensional subspace of the normed space X. If x + Me X/M, show that there exists an element y = x + M such that ||y|| = ||x + M||.
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