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math.FA2001
Interpolation of subspaces and applications to exponential bases in Sobolev spaces
S. Ivanov, N. Kalton
We give precise conditions under which the real interpolation space [Y_0,X_1]_{s,p} coincides with a closed subspace of the corresponding interpolation space [X_0,X_1]_{s,p} when Y…
math.FA1999
Interpolation of subspaces and applications to exponential bases
Sergei Ivanov
This paper has been withdrawn by the author becouse the conjecture presented in this paper is false. The correct study of metrics in interpolation spaces for and applcation to nonh…