
arXiv: 2302.01832
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.
Mathematics - Analysis of PDEs, FOS: Mathematics, Analysis of PDEs (math.AP)
Mathematics - Analysis of PDEs, FOS: Mathematics, Analysis of PDEs (math.AP)
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