Agranovich, M. S. On elliptic pseudodifferential operators on a closed curve. (Russian) Zbl 0573.35071 Tr. Mosk. Mat. O.-va 47, 22-67 (1984). The author studies the spectral properties of a classical elliptic pseudo-differential operator A on the circle \(S^ 1\). He obtains the asymptotic expansion for the eigenvalues of A by some conditions on its principal and subprincipal symbols. Reviewer: Yu.V.Egorov Cited in 1 ReviewCited in 18 Documents MSC: 35P20 Asymptotic distributions of eigenvalues in context of PDEs 35S05 Pseudodifferential operators as generalizations of partial differential operators Keywords:spectral properties; classical elliptic pseudo-differential operator; asymptotic expansion; eigenvalues PDFBibTeX XMLCite \textit{M. S. Agranovich}, Tr. Mosk. Mat. O.-va 47, 22--67 (1984; Zbl 0573.35071)