Gutiérrez García, JavierKubiak, Tomasz2017-06-162017-06-162007-10-011576-9402https://riunet.upv.es/handle/10251/83070[EN] All the higher separation axioms in topology, except for complete regularity, are known to have sandwich-type characterizations. This note provides a characterization of complete regularity in terms of inserting a continuous real-valued function. The known fact that each continuous real valued function on a compact subset o fa Tychonoff space has a continuous extension to the whole space is obtained as a corollary.Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)InsertionSandwich theoremInsertion theoremCompletely regular spaceLower semicontinuousUpper semicontinuousCompactArtículo2017-06-1610.4995/agt.2007.1887Abierto1989-4147