| Oscillations for a Class of Second Order Nonlinear Differential Equations |
| Received:September 11, 1997 Revised:June 21, 1999 |
| Key Words:
oscillation integral average nonlinear.
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| Abstract: |
| In this paper, we disscuss a class of second order nonlinear differential equations (a(t)y′(t))′+p(t)y′(t-τ(t))-q(t)f(y(t))=0, t≥t0(1) and (a(t)y′(t))′-p(t)y′(t+τ(t))-q(t)f(y(t))=0, t≥t0(2) where, a(t),p(t),q(t),τ(t)∈C ［(t0，∞),(0,∞)］,f(u)∈C(R,R)， sufficient conditions are obtained for all solutions of the equations to be oscillatory. |
| Citation: |
| DOI:10.3770/j.issn:1000-341X.2000.04.015 |
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