Semi-nonoscillation intervals and sign-constancy of Green’s functions of two-point impulsive boundary-value problems

UDC 517.9 We consider the second order impulsive differential equation with delays where for In this paper, we obtain the conditions of semi-nonoscillation for the corresponding homogeneous equation on the interval Using these results, we formulate theorems on sign-constancy of Green's functions for two-point impulsive boundary-value problems in terms of differential inequalities.