A remark on complemented subspaces of unitarym atrixs paces

Research output: Contribution to journalArticlepeer-review


Theorem A. Let P be a bounded projection in a unitary matrix space CE. Then either PCE or (I-P)CE contains a subspace which is isomorphic to CE and complemented in CE.

Original languageEnglish
Pages (from-to)601-608
Number of pages8
JournalProceedings of the American Mathematical Society
Issue number4
StatePublished - Aug 1980
Externally publishedYes


  • C-spaces
  • Compact operators on Hubert spaces
  • Complemented subspaces
  • Symmetric sequence spaces
  • Unitary matrix spaces

ASJC Scopus subject areas

  • General Mathematics
  • Applied Mathematics


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