Propagation of regularity for a class of systems of real vector fields on torus

We characterize the global hypoellipticity, almost hypoellipticity and solvability for a class of systems of real vector fields on the (n + 1)-dimensional torus as well as the same properties about the sum of squares associated to the system. The key result is a theorem about propagation of regulari...

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Hauptverfasser:	Ferra, Igor Ambo, Santos, Luís Antônio Carvalho dos
Format:	Artikel
Sprache:	eng
Schlagworte:	Mathematics - Analysis of PDEs
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