Noussair, E. S. and Yoshida, N.:
Nonoscillation Criteria for Elliptic Equations of Order 2 m
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Serie 8 59 (1975), fasc. n.1-2, p. 57-64, (English)
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Sunto
Vengono stabiliti criteri di non oscillazione per equazioni a derivate parziali ellittiche d'ordine pari.
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