RT Journal Article T1 Reiteration formulae for interpolation methods associated to polygons A1 Cobos Díaz, Fernando A1 Richter, Christian A1 Ullrich, Tino AB We study spaces generated by applying the interpolation methods defined by a polygon Π to an N-tuple of real interpolation spaces with respect to a fixed Banach couple {X, Y }. We show that if the interior point (α,β) of the polygon does not lie in any diagonal of Π then the interpolation spaces coincide with sums and intersections of real interpolation spaces generated by {X, Y }. Applications are given to N-tuples formed by Lorentz function spaces and Besov spaces. Moreover, we show that results fail in general if (α,β) is in a diagonal. PB Academic Press-Elsevier SN 0022-247X YR 2009 FD 2009 LK https://hdl.handle.net/20.500.14352/49852 UL https://hdl.handle.net/20.500.14352/49852 LA eng NO Ministerio de Ciencia, Innovación y Universidades (España) NO Comunidad de Madrid NO Sociedad Alemana de Investigación NO Servicio Alemán de Intercambio Académico NO Universidad Complutense de Madrid DS Docta Complutense RD 7 abr 2025