Geodesic
Soluzioni di tipo barriera
Bollettino della Unione matematica italiana, Série 8, 4B (2001) no. 1, pp. 131-142.

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

We present the general theory of barrier solutions in the sense of De Giorgi, and we consider different applications to ordinary and partial differential equations. We discuss, in particular, the case of second order geometric evolutions, where the barrier solutions turn out to be equivalent to the well-known viscosity solutions. 
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Novaga, Matteo. Soluzioni di tipo barriera. Bollettino della Unione matematica italiana, Série 8, 4B (2001) no. 1, pp. 131-142. http://geodesic.mathdoc.fr/item/BUMI_2001_8_4B_1_a2/

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