A family of degenerate differential operators |
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Authors: | Michael Christ |
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Institution: | 1. Department of Mathematics, UCLA, 90024, Los Angeles, CA
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Abstract: | Certain second-order partial differential operators, expressed as sums of squares of complex vector fields, are shown not
to beC
∞ hypoelliptic even at a point, rather than merely in an open set. The proof is based on an asymptotic analysis of a family
of ordinary differential operators depending on a complex parameter.
Research supported by the National Science Foundation. |
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Keywords: | |
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