Geodesic
On the Number of Solutions of Some Semilinear Elliptic Problems
Bollettino della Unione matematica italiana, Série 9, Tome 4 (2011) no. 3, pp. 313-319.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

We show that a class of semilinear boundary value problems possess exactly one positive solution and one negative solution. 
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Ambrosetti, Antonio. On the Number of Solutions of Some Semilinear Elliptic Problems. Bollettino della Unione matematica italiana, Série 9, Tome 4 (2011) no. 3, pp. 313-319. http://geodesic.mathdoc.fr/item/BUMI_2011_9_4_3_a0/

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