Geodesic
Semilinear Second Order Elliptic Oscillation
Canadian mathematical bulletin, Tome 22 (1979) no. 2, pp. 139-157

Voir la notice de l'article provenant de la source Cambridge University Press

These pages summarize recent progress on the oscillation problem for semilinear elliptic partial differential equations of the form (1) in unbounded domains Ω in n-dimensional Euclidean space R n. Our attention is restricted to the second order symmetric equation (1), and completeness is not attempted; the emphasis is on results obtained in the last five years. 
Swanson, C. A. Semilinear Second Order Elliptic Oscillation. Canadian mathematical bulletin, Tome 22 (1979) no. 2, pp. 139-157. doi: 10.4153/CMB-1979-021-0
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