Journal d'Analyse Mathématique

, Volume 135, Issue 2, pp 757–800 | Cite as

Fourier multipliers, symbols, and nuclearity on compact manifolds

  • Julio Delgado
  • Michael RuzhanskyEmail author
Open Access


The notion of invariant operators, or Fourier multipliers, is discussed for densely defined operators on Hilbert spaces, with respect to a fixed partition of the space into a direct sum of finite-dimensional subspaces. As a consequence, given a compact manifold M endowed with a positive measure, we introduce a notion of the operator’s full symbol adapted to the Fourier analysis relative to a fixed elliptic operator E. We give a description of Fourier multipliers, or of operators invariant relative to E. We apply these concepts to study Schatten classes of operators on L2(M) and to obtain a formula for the trace of trace class operators. We also apply it to provide conditions for operators between Lp-spaces to be r-nuclear in the sense of Grothendieck.


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Authors and Affiliations

  1. 1.Department of MathematicsImperial College LondonLondonUnited Kingdom

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