Wong’s oscillation theorem for second-order delay differential equations

• Published in: Нелінійні коливання
• Date: 2016
• Main Authors: Özbekler, A., Zafer, A.
• Format: Article
• Language: English
• Published: Інститут математики НАН України 2016
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/177242
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Wong’s oscillation theorem for second-order delay differential equations / A. Özbekler and A. Zafer // Нелінійні коливання. — 2016. — Т. 19, № 1. — С. 93-100 — Бібліогр.: 15 назв. — англ.

Let 
 H(t) := ∫1/(r(s)z²(s)) (∫z(k)f(k)dk) ds, 
 where z is a positive solution of 
 (r(t)x')' + q(t)x = 0, t ≥ a, 
 satisfying 
 ∫1 / (r(s)z²(s)) ds < ∞. 
 It is well known that, see [J. S. W. Wong, J. Math. Anal. and Appl. — 1999. —...