New nonoscillation criteria for delay differential equations

AbstractThis paper is concerned with the nonoscillation of first order delay differential equations of the form x′(t)+p(t)xτ(t)=0,t⩾t0, where p,τ∈C([t0,∞),R+), R+=[0,∞), τ(t) is nondecreasing, τ(t)