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On the \( K \)-functionals of Absolutely Calderón Elements of the Banach Pair \( (l_{1},c_{0}) \)

  • V. I. Dmitriev,
  • E. V. Zhuravleva,
  • O. Yu. Mikhailova,
  • I. N. Burilich

摘要

We characterize the absolutely Calderón elementsof the canonical pair $ (l_{1},c_{0}) $ of sequence spaces in terms of the Peetre $ K $ -functional. This result has been known to the firstauthor since rather long ago but the proof appears here.Also, we formulate a few unsolved problems.