General Holmstedt's Formulae for the K-Functional

Irshaad Ahmed, Georgi E. Karadzhov, Ali Raza
2017 Journal of Function Spaces  
Explicit formulae for the K-functional for the general couple ((A0,A1)Φ0,(A0,A1)Φ1), where (A0,A1) is a compatible couple of quasi-normed spaces, are proved. As a consequence, the corresponding reiteration theorems are derived.
doi:10.1155/2017/4958073 fatcat:mxator7gajacrbtcfh573skevu