Sabatini, Marco:
A sufficient condition for a polynomial centre to be global (Una condizione sufficiente perché un centro polinomiale sia globale)
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Serie 9 2 (1991), fasc. n.4, p. 281-285, (English)
pdf (610 Kb), djvu (125 Kb). | MR1152634 | Zbl 0757.34025
Sunto
Per il sistema autonomo differenziale \( (S) \) del testo si danno condizióni sufficienti affinché l'origine.\( O \) sia un centro globale.
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