【摘要】 研究具正负系数的二阶线性中立型时滞微分方程d2dt2 [x(t) +p(t) x(t-τ) ]+Q1 (t) x(t-σ1 ) - Q2 (t) x(t-σ2 ) =0 ,得到了该方程存在非振动解的充分性条件更多还原

【Abstract】 In this paper,the neutral delay differential equations with positive and negative coefficientsd 2dt 2[x(t)+p(t)x(t-τ)]+Q 1(t)x(t-σ 1)-Q 2(t)x(t-σ 2)=0,is studied and a sufficient condition for the existence of a nonoscillatory solution of the equation is obtained.更多还原