By Marco Bramanti
Hörmander's operators are an enormous classification of linear elliptic-parabolic degenerate partial differential operators with gentle coefficients, which were intensively studied because the overdue Nineteen Sixties and are nonetheless an energetic box of study. this article presents the reader with a normal review of the sector, with its motivations and difficulties, a few of its basic effects, and a few contemporary strains of development.
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