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Rich lattices of multiplier topologies

Research output: Contribution to journalArticlepeer-review

Abstract

Each symmetrically-normed ideal I of compact operators on a Hilbert space H induces a multiplier topology μI on the algebra B(H) of bounded operators. We show that under fairly reasonable circumstances those topologies precisely reflect, strength-wise, the inclusion relations between the corresponding ideals, including the fact that the topologies are distinct when the ideals are. Said circumstances apply, for instance, for the two-parameter chain of Lorentz ideals Lp,q interpolating between the ideals of trace-class and compact operators. This gives a totally ordered chain of distinct topologies μp,q∣0 on B(H), with μ2,2∣0 being the σ-strong topology and μ∞,∞∣0 the strict/Mackey topology. In particular, the latter are only two of a natural continuous family.

Original languageEnglish
Pages (from-to)165-189
Number of pages25
JournalAnalysis Mathematica
Volume51
Issue number1
DOIs
StatePublished - Mar 2025

Keywords

  • Dixmier trace
  • Lorentz ideal
  • Mackey topology
  • Schatten ideal
  • characteristic number
  • compact operator
  • interpolation
  • locally convex
  • multiplier
  • quasi-norm
  • symmetric norming function
  • symmetrically-normed
  • trace

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