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<p>We study composition operators whose symbols are suitable perturbations of the identity and which act between different weighted modulation classes. We consider both modulation spaces formed by tempered distributions and those whose elements are ultradistributions defined in terms of a subadditive weight.</p>

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Composition Operators on Weighted Modulation Spaces

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月15日

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  • Héctor Ariza,
  • Carmen Fernández,
  • Antonio Galbis

摘要

We study composition operators whose symbols are suitable perturbations of the identity and which act between different weighted modulation classes. We consider both modulation spaces formed by tempered distributions and those whose elements are ultradistributions defined in terms of a subadditive weight.