Cobos Díaz, FernandoKühn, Thomas2023-06-192023-06-192014-010944-266910.1007/s00526-013-0602-zhttps://hdl.handle.net/20.500.14352/33488We establish compactness results for extrapolation constructions which correspond to the well-known Lions-Peetre compactness theorems of interpolation theory. Applications are given to compactness of certain limiting Sobolev embeddings.engjournal articlehttps//doi.org/10.1007/s00526-013-0602-zhttp://link.springer.com/article/10.1007/s00526-013-0602-zopen access517.9Aronszajn-Gagliardo functorsEntropy numbersInterpolation spacesEcuaciones diferenciales1202.07 Ecuaciones en Diferencias