Oscillation Of Solutions For Several Classes Of Higher Order Netrual Differential Equations

This thesis of Master is composed of three charpters, which mainly stud-ied oscillation of the solutions for several classes of higher order delay netrual diffcrcntial cquations.In charpter one, we study oscillation of the solutions for a class of higher order nctrual delay diffcrcntial equationsand establish some sufficient conditions of the oscillation for all solutions whenIn charpter two, we mainly consider the existence of oscillating solutions for higher order netrual delay differential equations with forcing termand further study special cases about the equationobtaining the oscillation of solutions. Our results improve the related conclusion in the literatures.In chapter three. we investigate the higher order netrual differential delay equations with continuous distributed delayUsing the method of direct analysis. we study its properties of solutions and obtain two sufficient equations of this equation being oscillation. A sufficient equation is established for the oseillation of all unbounded solutions about this eqnation.