Year: 2026
Type: article
Abstract: Many results of smooth hypoellipticity are available for scalar equations. Much remains to be done for systems and/or at different levels of regularity and in particular for L 1 -hypoellipticity. In this article we provide some examples and counter-examples.
Source: Annales Henri Lebesgue
DOI: 10.5802/ahl.261
Authors: Valeria Banica, Nicolas Burq
Language: English
Subfield: Mathematical Physics
Field: Mathematics
Domain: Physical Sciences
Open Access status: diamond
Funder: Institut Universitaire de France
OpenAlex ID: W7138271992