Necessary and Sufficient Conditions for Oscillations to a Second-Order Neutral Differential Equations with Impulses


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Authors: A. K. TRIPATHY AND S. S. SANTRA

DOI: 10.46793/KgJMat2301.081T

Abstract:

In this work, we obtain necessary and sufficient conditions for oscillation of solutions of second-order neutral impulsive differential system

{                    ∑
  (r (t)(z′(t))γ)′ +    m   q(t)x αi(σ (t)) =  0,   t ≥  t ,t ⁄=  λ ,
                     γ  i=1∑m i         i                  0       k
  Δ  (r(λk )(z′(λk) ) ) +    i=1 hi(λk )xαi(σi (λk)) =  0,   k =  1, 2,3, ...,

where z(t) = x(t) + p(t)x(τ(t)). Under the assumption 0(r(η))1∕γ= , we consider two cases when γ > αi and γ < αi. Our main tool is Lebesgue’s Dominated Convergence theorem. Examples are given to illustrate our main results and we state an open problem.



Keywords:

Oscillation, non-oscillation, neutral, delay, Lebesgue’s dominated convergence theorem, impulses.



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