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Everything about Singular trace

Noncommutative geometric structure

In mathematics, a singular trace is a trace on a space of linear operators of a separable Hilbert space that vanishes on operators of finite rank. Singular traces are a feature of infinite-dimensional Hilbert spaces such as the space of square-summable sequences and spaces of square-integrable functions. Linear operators on a finite-dimensional Hilbert space have only the zero functional as a singular trace since all operators have finite rank. For example, matrix algebras have no non-trivial singular traces and the matrix trace is the unique trace up to scaling. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Singular traceA 5-minute orientation
  2. Skim a recent paper: The Wave Trace and Resonances of the Magnetic Hamiltonian with Singular Vector PotentialsInfluential work since 2022
  3. Pick up a classic book: Harmonic analysisThe most-reprinted book on the subject
  4. Read the landmark paper: Stable trace formula: Elliptic singular termsCited 155 times
  5. Go sideways: Commutator subspaceA closely related topic
  6. Go sideways: Weak trace-class operatorA closely related topic

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