By Marco Bramanti
Hörmander's operators are a big category of linear elliptic-parabolic degenerate partial differential operators with delicate coefficients, which were intensively studied because the overdue Nineteen Sixties and are nonetheless an energetic box of analysis. this article offers the reader with a basic review of the sector, with its motivations and difficulties, a few of its basic effects, and a few contemporary traces of development.
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An Invitation to Hypoelliptic Operators and Hörmander's Vector Fields (SpringerBriefs in Mathematics) by Marco Bramanti