Duality for Interpolation Spaces Defined Via Slowly Varying Functions: The Case 0<q<1

P. Fernández-Martínez, M. Grover, T. M. Signes

Given $(A_0,A_1)$ a compatible couple of Banach spaces, we describe the dual of the limiting real interpolation space $(A_0,A_1{)}_{1,q,b}^K$ for $0<q<1$ and $b$ a slowly va…