The nonequivalence of oscillation and nondisconjugacy
Author:
G. B. Gustafson
Journal:
Proc. Amer. Math. Soc. 25 (1970), 254-260
MSC:
Primary 34.42
DOI:
https://doi.org/10.1090/S0002-9939-1970-0284648-4
MathSciNet review:
0284648
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Abstract | References | Similar Articles | Additional Information
Abstract: A sufficient condition is given for all solutions of the adjoint of an $n$th order linear differential equation to have an infinity of zeros; an example is presented which shows that for every integer $n > 2$, there exists an $n$th order equation, all of whose solutions have a finite number of zeros, but the adjoint has only solutions with an infinity of zeros. In addition, some open equations on conjugate points are answered.
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J. M. Dolan, Oscillatory behavior of solutions of linear ordinary differential equations of third order, Ph.D. Dissertation, University of Tennessee, Knoxville, Tenn., 1967.
---, On the relationship between the oscillatory behavior of a linear third-order equation and its adjoint, J. Differential Equations (to appear).
G. B. Gustafson, Conjugate point properties for $n$th order linear differential equations, Ph.D. Dissertation, Arizona State University, Tempe, Ariz., 1968.
- Maurice Hanan, Oscillation criteria for third-order linear differential equations, Pacific J. Math. 11 (1961), 919–944. MR 145160
- Philip Hartman, Ordinary differential equations, John Wiley & Sons, Inc., New York-London-Sydney, 1964. MR 0171038
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Keywords:
<IMG WIDTH="18" HEIGHT="20" ALIGN="BOTTOM" BORDER="0" SRC="images/img2.gif" ALT="$n$">th conjugate point,
oscillatory,
nonoscillatory,
strongly oscillatory,
disconjugate,
zeros counted according to multiplicity
Article copyright:
© Copyright 1970
American Mathematical Society