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Garrido Carballo, María Isabel Montalvo, Francisco 2023-06-20T18:46:01Z 2023-06-20T18:46:01Z 1991 0213-8743 https://hdl.handle.net/20.500.14352/58551 https://doi.org/10.1016/0166-8641(92)90054-4 http://www.eweb.unex.es/eweb/extracta/ From the introduction: "We study the uniform closure of a linear subspace of real-valued functions and we obtain, in particular, a necessary and sufficient condition for uniform density in C(X). These results generalize, for the unbounded case, those obtained by J. L. Blasco and A. Moltó [Ann. Mat. Pura Appl. (4) 134 (1983), 233–239 for the bounded case. The approximation technique used by them (essentially the same one used in papers by Tietze, S. Mrówka and G. J. O. Jameson) is also the starting point for us.'' eng open access Uniform approximation theorems for real-valued continuous functions journal article