References
E. A. Coddington andN. Levinson: «Theory of Ordinary Differential Equations», New York, 1955.
F. R. Gantmacher andM. G. Krein: «Oszillationsmatrizen, Oszillationskerne und kleine Schwingungen mechanischer Systeme», Berlin 1960.
I. I. Hirschman Jr.: «Variation diminishing Hankel transforms», J. d’analyse Math. 8 (1960–61), pp. 307–336.
I. I. Hirschman Jr.: «Variation diminishing transformations and ultraspherical polynomials», J. d’Analyse Math. 8 (1960–61), pp. 337–360.
I. I. Hirschman Jr.: «Variation diminishing transformations and orthogonal polynomials», to appear in J. d’Analyse Math.
I. I. Hirschman Jr. andD. V. Widder: «The Convolution Transform», Princeton 1955.
S. Karlin andJ. McGregor: «Coincidence properties of birth and death processes», Pacific Jour. of Math. 9 (1959), pp. 1109–1140.
N. Levinson: «On the uniqueness of the potential in aSchrödinger equation for a given asymptotic phase», Matematisk-Fysiske Meddelelser, 25 (1949), no. 10.
I. J. Schoenberg: «On Pólya frequency functions, I», J. d’Analyse Math. 1 (1951), pp. 33–374.
I. J. Schoenberg: «On Pólya frequency functions, II», Acta Sci. Math. Szeged, 12 (1950), 97–106.
I. J. Schoenberg: «On totally positive functions, Laplace integrals and entire functions of Laguerre-Pólya-Schur type», Proc. Nat. Acad. Sci. U.S.A., 33 (1947), pp. 11–17.
I. J. Schoenberg: «On variation diminishing integral operators of the convolution type», Proc. Nat. Acad. Sci. U.S.A., 34 (1948), pp. 164–159.
E. C. Titchmarsh: «Eigenfunction Expansions Associated with Second-order Differential Equations», Oxford 1946.
Additional information
This work was carried out while the author was in residence in Zurich, and was supported by the United States Air Force through the Air Force Office of Scientific Research and Development Command under Contract No. AF 49 (638)-846.
Rights and permissions
About this article
Cite this article
Hirschman, I.I. Variation diminishing transformations andSturm-Liouville systems. Commentarii Mathematici Helvetici 36, 214–233 (1962). https://doi.org/10.1007/BF02566900
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02566900