%0 Journal Article %A Caamaño Aldemunde, Iván %A Jaramillo Aguado, Jesús Ángel %A Prieto Yerro, M. Ángeles %A Ruiz de Alarcón, Alberto %T Sobolev spaces of vector-valued functions %D 2020 %@ 1578-7303 %U https://hdl.handle.net/20.500.14352/7599 %X We are concerned here with Sobolev-type spaces of vector-valued functions. For an open subset Ω ⊂ R N and a Banach space V , we compare the classical Sobolev space W1,p(Ω, V ) with the so-called Sobolev-Reshetnyak space R1,p(Ω, V ). We see that, in general, W1,p(Ω, V ) is a closed subspace of R1,p(Ω, V ). As a main result, we obtain that W1,p(Ω, V ) = R1,p(Ω, V ) if, and only if, the Banach space V has the Radon-Nikod´ym property. %~