On the instability of nonlinear functional differential equations of fifth order

TUNÇ C.

BOLETIN DE MATEMATICAS, cilt.24, sa.2, ss.155-168, 2017 (ESCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 2
  • Basım Tarihi: 2017
  • Dergi Adı: BOLETIN DE MATEMATICAS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Academic Search Premier, Fuente Academica Plus, zbMATH, DIALNET
  • Sayfa Sayıları: ss.155-168
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

The author gives sufficient conditions for non-existence of periodic solutions of two higher order nonlinear delay differential systems. Our technical approach is based on the construction of two suitable Lyapunov type functionals. An example is given to illustrate the obtained results. The main results here improve recent results found on the topic in the literature from the case of without delay to the delay case.