Spectral Theory

  • Fabio Nicola
  • Luigi Rodino
Part of the Pseudo-Differential Operators book series (PDO, volume 4)


In this chapter we study some problems of Spectral Theory for pseudo-differential operators with hypoelliptic symbols in the classes S(M; Ф, Ψ) considered in Chapter 1; see in particular Sections 1.1 and 1.3.1.


Orthonormal Basis Spectral Theory Compact Operator Polar Decomposition Unbounded Operator 


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Copyright information

© Springer Basel AG 2010

Authors and Affiliations

  • Fabio Nicola
    • 1
  • Luigi Rodino
    • 2
  1. 1.Dipartimento di MatematicaPolitecnico di TorinoTorinoItaly
  2. 2.Dipartimento di MatematicaUniversità di TorinoTorinoItaly

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