OSCILLATION CRITERIA FOR NTH ORDER NEUTRAL FUNCTIONAL-DIFFERENTIAL EQUATIONS

[摘要] In this paper we establish some new criteria for the oscillation of nth order neutral functional differential equations of the form dt(n)/dt(n)(x(t) + cx(t - h) + c*x(t + h*)) + qx(t - g) + px(t + g*) = 0, n is even, where c, c*, h, h*, p, and q are real numbers and g and g* are positive constants. (C) 1994 Academic Press, Inc.

[发布日期] 1994-05-15