Causal C0 operators and feedback stability

Research output: Contribution to journalArticlepeer-review


Linear feedback systems, for which the return difference T is a C0 operator are studied. It is shown that if T is essentially unitary then such a system is well posed and stable. All strictly causal C0 operators for which I-T*T is compact are characterized.

Original languageEnglish
Pages (from-to)283-288
Number of pages6
JournalMathematical Systems Theory
Issue number1
StatePublished - 1 Dec 1977

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Mathematics (all)
  • Computational Theory and Mathematics


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