Swick, K. E.:
Boundedness and stability for a nonlinear third order differential equation
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Serie 8 56 (1974), fasc. n.6, p. 859-865, (English)
pdf, djvu. | MR 0399597 | Zbl 0326.34062
Sunto
Data l'equazione $\dddot{x} + a\ddot{x} + g(x) \dot{x} + h(x) = p(t,x,\dot{x},\ddot{x})$ l'Autore, trova per le funzioni g,h,p condizioni sufficienti per la uniforme limitatezza e convergenza a zero delle soluzioni. I risultati dipendono essenzialmente su disuguaglianze relative a $(1/x) \int_{0}^{x} g(u) \, du$, $h(x)x$.
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