Kac, I. S.; Kreĭn, M. G. Criteria for the discreteness of the spectrum of a singular string. (Russian) Zbl 1469.34111 Izv. Vyssh. Uchebn. Zaved., Mat. 1958, No. 2(3), 136-153 (1958). MSC: 34L05 34B24 PDFBibTeX XMLCite \textit{I. S. Kac} and \textit{M. G. Kreĭn}, Izv. Vyssh. Uchebn. Zaved., Mat. 1958, No. 2(3), 136--153 (1958; Zbl 1469.34111)
Omel’chenko, O. K. The distribution of zeros of eigenfunctions of a self-adjoint elliptic operator of the second order. (Über das Problem der Trennung der Nullstellen der Eigenfunktionen eines selbstadjungierten Operators zweiter Ordnung vom elliptischen Typus.) (Russian) Zbl 0128.32702 Izv. Vyssh. Uchebn. Zaved., Mat. 1958, No. 4(5), 184-190 (1958). MSC: 35Jxx 35Pxx 47F05 PDFBibTeX XMLCite \textit{O. K. Omel'chenko}, Izv. Vyssh. Uchebn. Zaved., Mat. 1958, No. 4(5), 184--190 (1958; Zbl 0128.32702)
Shishkin, A. A. Eigenvalues and characteristic functions of some fourth order differential operators containing a small parameter in the higher derivative term. (Russian) Zbl 0092.30204 Dokl. Akad. Nauk SSSR 123, 249-251 (1958). Reviewer: E. A. Coddington MSC: 34L15 PDFBibTeX XMLCite \textit{A. A. Shishkin}, Dokl. Akad. Nauk SSSR 123, 249--251 (1958; Zbl 0092.30204)
Levitan, B. M.; Marchenko, V. A.; Naĭmark, M. A. Spektraltheorie der Differentialoperatoren. (Russian) Zbl 0092.07901 Trudy tret’ego vsesojuzn. mat. S”ezda, Moskva, Ijun’-Ijul’ 1956, 3, 101-116 (1958). MSC: 34Lxx 47E05 PDFBibTeX XML
Solomyak, M. Z. The application of the semigroup theory to the study of differential equations in Banach spaces. (Russian) Zbl 0090.09902 Dokl. Akad. Nauk SSSR 122, 766-769 (1958). Reviewer: Gheorghe Gussi (Bucureşti) MSC: 47H20 34G20 35Jxx PDFBibTeX XMLCite \textit{M. Z. Solomyak}, Dokl. Akad. Nauk SSSR 122, 766--769 (1958; Zbl 0090.09902)
Gillis, Paul P. Propriétés et existence des solutions de certaines classes d’équations du type elliptique. (French) Zbl 0087.30104 Bull. Soc. Math. Fr. 86, 283-297 (1958). Reviewer: C. Racine MSC: 35Jxx 35-02 PDFBibTeX XMLCite \textit{P. P. Gillis}, Bull. Soc. Math. Fr. 86, 283--297 (1958; Zbl 0087.30104) Full Text: DOI Numdam EuDML
Sakhnovich, L. A. Inverse problem for differential operators of order \(n>2\) with analytic coefficients. (Russian) Zbl 0084.28403 Mat. Sb., N. Ser. 46(88), 61-76 (1958). MSC: 34L99 PDFBibTeX XMLCite \textit{L. A. Sakhnovich}, Mat. Sb., Nov. Ser. 46(88), 61--76 (1958; Zbl 0084.28403) Full Text: EuDML MNR
Maslov, K. V.; Povzner, A. Ya. On infinitesimal operators of a class of Markov processes. (Russian. English summary) Zbl 0080.12102 Teor. Veroyatn. Primen. 3, 70-83 (1958). Reviewer: Radu Theodorescu (Bucureşti) MSC: 60H15 60J25 PDFBibTeX XMLCite \textit{K. V. Maslov} and \textit{A. Ya. Povzner}, Teor. Veroyatn. Primen. 3, 70--83 (1958; Zbl 0080.12102)
Shtraus, A. V. Über verallgemeinerte Resolventen und Spektralfunktionen von Differentialoperatoren gerader Ordnung. (Russian) Zbl 0078.11902 Izv. Akad. Nauk SSSR, Ser. Mat. 21, 785-808 (1958). MSC: 47E05 47A05 34L05 PDFBibTeX XMLCite \textit{A. V. Shtraus}, Izv. Akad. Nauk SSSR, Ser. Mat. 21, 785--808 (1958; Zbl 0078.11902)