Geodesic
Nonoscillation Criteria for Elliptic Equations of Order 2 m
Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 59 (1975) no. 1-2, pp. 57-64 Cet article a éte moissonné depuis la source Biblioteca Digitale Italiana di Matematica

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Vengono stabiliti criteri di non oscillazione per equazioni a derivate parziali ellittiche d'ordine pari. 
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     title = {Nonoscillation {Criteria} for {Elliptic} {Equations} of {Order} 2 m},
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Noussair, E. S.; Yoshida, N. Nonoscillation Criteria for Elliptic Equations of Order 2 m. Atti della Accademia nazionale dei Lincei. Rendiconti della Classe di scienze fisiche, matematiche e naturali, Série 8, Tome 59 (1975) no. 1-2, pp. 57-64. http://geodesic.mathdoc.fr/item/RLINA_1975_8_59_1-2_a10/

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