【摘要】 考虑ｎ阶混合中立型方程，建立了几个比较定理．在一定的条件下，可将中立型方程的振动性问题转化为相关的非中立型方程的振动性问题来处理．更多还原

【Abstract】 Considering the n-th order mixed neutral equations,we establish several comparison theorems which show that ,under appropriate hypotheses ,the oscillation problems of the neutral equations are determined by the oscillation problems of the associated nonneutral differential equations.更多还原