Oscillation of solutions of a neutral pantograph equation with impulsive perturbations

Some sufficient conditions are established on the oscillation of all solutions of a class of neutral pantograph equations with impulsive perturbations of the form {begin{array}{l}frac{d}{dt}[x(t)-C(t)x(gamma t)]+ frac{P(t)}{t}x(alpha t)-frac{Q(t)}{t}x(beta t)=0,~~ tgeq t_{0} 0,~~ tneq t_{k}, x(t^{+}_{k})=b_{k}x(t_{k}), k=1,2,... . end{array}right.