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A lower bound for systems with double characteristics |
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| Authors: | Fabio Nicola |
| Affiliation: | (1) Dipartmento di Matematica, Politecnico di Torino, C.So Duca degli Abruzzi 24, 10129 Torino, Italy |
| Abstract: | We give necessary and sufficient conditions for a lower bound with a gain of 3/2 derivatives (the so-called Weak-Hörmander inequality) for a class of systems with double characteristics. |
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