×

The finiteness of the number of gaps in the spectrum of a many- dimensional polyharmonic operator with periodic potential. (Russian) Zbl 0464.35064


MSC:

35P05 General topics in linear spectral theory for PDEs
31B05 Harmonic, subharmonic, superharmonic functions in higher dimensions
35J10 Schrödinger operator, Schrödinger equation
35J30 Higher-order elliptic equations
PDFBibTeX XMLCite
Full Text: EuDML