Geodesic
Strutture subriemanniane in alcuni problemi di Analisi
Bollettino della Unione matematica italiana, Série 8, 8B (2005) no. 2, pp. 273-298.

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

Vengono presentati alcuni problemi, idee e tecniche sorte nell'ambito della teoria delle equazioni alle derivate parziali del secondo ordine, con forma caratteristica semidefinita positiva e con soggiacenti strutture sub-riemanniane. Se ne traccia lo sviluppo a partire dalla classica teoria delle funzioni armoniche e caloriche, attraverso la teoria del potenziale negli spazi armonici astratti e la teoria della regolarità locale delle soluzioni.
We present some problems, ideas and techniques arising in the theory of Partial Differential Equations of Second Order with non-negative characteristic form and with underlying sub-riemannian structures. We show their development starting from the basic properties of classical harmonic and caloric functions. We stress their relationship with abstract potential theory and local regularity theory of solutions. 
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Lanconelli, Ermanno. Strutture subriemanniane in alcuni problemi di Analisi. Bollettino della Unione matematica italiana, Série 8, 8B (2005) no. 2, pp. 273-298. http://geodesic.mathdoc.fr/item/BUMI_2005_8_8B_2_a0/

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