A survey of the fundamental ideas which are the base of the socalled symmetrization method; a priori estimates in partial differential equations.
@article{BUMI_2000_8_3B_3_601_0, author = {Guido Trombetti}, title = {Metodi di simmetrizzazione nelle equazioni alle derivate parziali}, journal = {Bollettino dell'Unione Matematica Italiana}, volume = {3-A}, year = {2000}, pages = {601-634}, zbl = {0963.35006}, mrnumber = {1801615}, language = {it}, url = {http://dml.mathdoc.fr/item/BUMI_2000_8_3B_3_601_0} }
Trombetti, Guido. Metodi di simmetrizzazione nelle equazioni alle derivate parziali. Bollettino dell'Unione Matematica Italiana, Tome 3-A (2000) pp. 601-634. http://gdmltest.u-ga.fr/item/BUMI_2000_8_3B_3_601_0/
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