We show that the extremal extrapolation spaces for an operator with any function ξ characterizing the growth of the operator norms are the sum and the intersection of spaces whose norms depend on ξ and are written out explicitly.

中文翻译：

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极值外推空间

我们证明，对于具有算符范数增长特征的任何函数ξ的算子，其极值外推空间是其范数取决于ξ的空间的总和和交集，并且被明确地写出。