In this paper we shall obtain the best possible estimates for the remainder term in the asymptotic formula for the spectral function of an arbitrary elliptic (pseudo-)differential operator. This is achieved by means of a complete description of the singularities of the Fourier transform of the spectral function for low frequencies.
No takes yet. Share an insight, caveat, or question.
Lars Hörmander (1968) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: