The distance between a point and a set in a metric space or in a normed space is used in approximation of functionals (i read it in functional analysis book) can any body explain this please as i am unaware of approximation of functions
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1This is a bit vague. – copper.hat Nov 25 '16 at 08:38
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I m not getting your openion – Prince Khan Nov 25 '16 at 09:23
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Your question doesn't have enough information to be able to attempt an answer. – copper.hat Nov 25 '16 at 17:12