Geodesic
Oscillation Criteria for Quasilinear Equations
Canadian journal of mathematics, Tome 26 (1974) no. 4, pp. 931-947

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

Several authors have recently considered the problem of establishing sufficient criteria to guarantee the oscillation or non-oscillation of all solutions of a second order elliptic equation or system. We mention in particular the papers of C. A. Swanson, [15; 16], K. Kreith [9], Kreith and Travis [10], Noussair and Swanson [13], Allegretto and Swanson [3], Allegretto and Erbe [2] and the references therein. 
Allegretto, W. Oscillation Criteria for Quasilinear Equations. Canadian journal of mathematics, Tome 26 (1974) no. 4, pp. 931-947. doi: 10.4153/CJM-1974-088-0
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