The real interpolation method on couples of intersections

Abstract

Suppose that (X 0, X 1) is a Banach couple, X 0 ∩ X 1 is dense in X 0 and X 1, (X0,X1)θq (0 < θ < 1, 1 ≤ q < ∞) are the spaces of the real interpolation method, ψ ∈ (X 0 ∩ X 1)*, ψ ≠ 0, is a linear functional, N = Ker ψ, and N i stands fo Show more