D. Bainov et al., ON THE OSCILLATION PROPERTIES OF FIRST-ORDER IMPULSIVE DIFFERENTIAL-EQUATIONS WITH A DEVIATING ARGUMENT, Israel Journal of Mathematics, 98, 1997, pp. 167-187
For first order linear impulsive differential equations with a deviati
ng argument a number of oscillation theorems are proved (of the type o
f the Sturmian Theorem). Various criteria for oscillation or non-oscil
lation of the solutions of these equations are found. The oscillatory
properties of some concrete equations of the type considered are inves
tigated.