Some topics on the continuation and smoothing of vector functions
Matematičeskie zametki, Tome 58 (1995) no. 6, pp. 906-916.

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We consider problems of continuation of vector functions from a subspace to the entire space and of smoothing problems for these functions. It is shown that there exists a reflexive separable space $X$ and a subspace $Y$ such that even a very smooth mapping of $Y$ does not extend to a uniformly continuous mapping of a neighborhood of $Y$.
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     title = {Some topics on the continuation and smoothing of vector functions},
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I. G. Tsar'kov. Some topics on the continuation and smoothing of vector functions. Matematičeskie zametki, Tome 58 (1995) no. 6, pp. 906-916. http://geodesic.mathdoc.fr/item/MZM_1995_58_6_a9/

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