On a conjecture concerning the means of the eigenvalues of random Sturm-Liouville boundary value problems
Author:
William E. Boyce
Journal:
Quart. Appl. Math. 38 (1980), 241-245
MSC:
Primary 34B25; Secondary 34F05
DOI:
https://doi.org/10.1090/qam/580882
MathSciNet review:
580882
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Abstract: It has been known for several years that the expected value $\left \langle {{\lambda _1}} \right \rangle$ of the smallest eigenvalue of a self-adjoint positive definite random Sturm-Liouville boundary value problem satisfies the relation $\left \langle {{\lambda _1}} \right \rangle \le {\mu _1}$ where ${\mu _1}$ is the smallest eigenvalue of the corresponding deterministic problem obtained by replacing each random coefficient by its mean. It has been an open question whether similar inequalities are valid for the higher eigenvalues. The answer is negative, as shown by the counterexample given in this note.
- W. E. Boyce, Random vibration of elastic strings and bars, Proc. 4th U.S. Nat. Congr. Appl. Mech. (Univ. California, Berkeley, Calif., 1962) Amer. Soc. Mech. Engrs., New York, 1962, pp. 77–85. MR 0152193
- William E. Boyce, Random eigenvalue problems, Probabilistic Methods in Applied Mathematics, Vol. 1, Academic Press, New York, 1968, pp. 1–73. MR 0263171
- R. Courant and D. Hilbert, Methods of mathematical physics. Vol. I, Interscience Publishers, Inc., New York, N.Y., 1953. MR 0065391
- Walter Purkert and Jürgen vom Scheidt, Zur approximativen Lösung des Mittelungsproblems für die Eigenwerte stochastischer Differentialoperatoren, Z. Angew. Math. Mech. 57 (1977), no. 9, 515–525 (German, with English and Russian summaries). MR 480129, DOI https://doi.org/10.1002/zamm.19770570904
W. E. Boyce, Random vibrations of elastic strings and bars, in Proc. 4th U.S. Nat. Cong. Appl. Mech. (1962), 77–85
W. E. Boyce, Random eigenvalue problems, in Probabilistic methods in applied mathematics, vol. 1, A. T. Bharucha-Reid (editor), Academic Press, New York, 1968, 1–73
R. Courant and D. Hilbert, Methods of mathematical physics, vol. 1, Interscience, 1953, p. 459
W. Purkert and J. vom Scheidt, Zur approximativen Lösung des Mittelungsproblems für die Eigenwerte stochastischer Differentialoperatoren, ZAMM, 57, 515–525 (1977)
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Article copyright:
© Copyright 1980
American Mathematical Society