On the structure of spectra of periodic elliptic operators Academic Article uri icon


  • The paper discusses the problem of absolute continuity of spectra of periodic elliptic operators. A new result on absolute continuity for a matrix operator of Schrdinger type is obtained. It is shown that all types of operators for which the absolute continuity has previously been established can be reduced to this one. It is also discovered that some natural generalizations stumble upon an obstacle in the form of non-triviality of a certain analytic bundle on the two-dimensional torus.

published proceedings

  • Transactions of the American Mathematical Society

author list (cited authors)

  • Kuchment, P., & Levendorski, S.

citation count

  • 27

complete list of authors

  • Kuchment, Peter||Levendorski├«, Sergei

publication date

  • September 2001