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Global analytic regularity for sums of squares of vector fields |
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| Authors: | Paulo D. Cordaro A. Alexandrou Himonas |
| Affiliation: | IME - USP, Caixa Postal 66281, CEP 05389-970, São Paulo, SP, Brazil ; Department of Mathematics, University of Notre Dame, Notre Dame, Indiana 46556 |
| Abstract: | We consider a class of operators in the form of a sum of squares of vector fields with real analytic coefficients on the torus and we show that the zero order term may influence their global analytic hypoellipticity. Also we extend a result of Cordaro-Himonas. |
| Keywords: | Analytic hypoellipticity global torus sum of squares of vector fields finite type subelliptic |
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