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Disconjugacy Conditions for the Third Order Linear Differential Equation

Published online by Cambridge University Press:  20 November 2018

Lynn Erbe*
Affiliation:
University of Alberta, Edmonton
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An nth order homogeneous linear differential equation is said to be disconjugate on the interval I of the real line in case no non-trivial solution of the equation has more than n - 1 zeros (counting multiplicity) on I. It is the purpose of this paper to establish several necessary and sufficient conditions for disconjugacy of the third order linear differential equation

(1.1)

where pi(t) is continuous on the compact interval [a, b], i = 0, 1, 2.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1969

References

1. Lasota, A., Sur la distance entre les zéros de l'équation différentielle linéaire du troisièmeordre. Ann. Polon. Math. 13 (1963) 129132.Google Scholar
2. Mathsen, R.M., A disconjugacy condition for y"' + a2y" + a1y' + a0y = 0. Proc. Amer. Math. Soc. 17 (1966) 627632.Google Scholar
3. Mathsen, R.M., An integral condition for disconjugacy. J. Diff. Eqns. (to appear).Google Scholar
4. Jackson, L.K., Disconjugacy conditions for linear third order differential equations. J. Diff. Eqns. 4 (1968) 369372.Google Scholar
5. Hartman, P., Disconjugate nth order differential equations and principal solutions. Bull. Amer. Math. Soc. 74 (1968) 125129.Google Scholar
6. Knobloch, H. W., Comparison theorems for nonlinear second order differential equations. J. Diff. Eqns. 1 (1965) 126.Google Scholar
7. Erbe, L. H., Nonlinear boundary value problems for second order differential equations. J. Diff. Eqns. (to appear).Google Scholar
8. Reid, W., Comparison theorems for nonlinear vector differential equations. J. Diff. Eqns. 5 (1969) 324337.Google Scholar
9. Hartman, P., Ordinary differential equations. (Wiley, New York, 1964).Google Scholar