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Results tagged with reference-request
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user 36564
This tag is used if a reference is needed in a paper or textbook on a specific result.
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Sufficient criteria for $X \subset \mathcal{H}$ to be a Lipschitz (or unif. cont.) retract o...
I think what you are looking for is Kirszbraun theorem: https://en.wikipedia.org/wiki/Kirszbraun_theorem
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