A remark on sums of squares of complex vector fields
Complex Variables
2007-05-23 v1 Analysis of PDEs
Abstract
This note is a comment on a recent paper by J. J. Kohn. We give an example of a second order partial differential operator, expressed as a sum of squares of complex vector fields satisfying the bracket condition, that is not hypoelliptic.
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Cite
@article{arxiv.math/0503506,
title = {A remark on sums of squares of complex vector fields},
author = {Michael Christ},
journal= {arXiv preprint arXiv:math/0503506},
year = {2007}
}
Comments
5 pages