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Lower Bound Estimates Without Transversal Ellipticity |
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| Authors: | Marco Mughetti Cesare Parenti |
| Affiliation: | 1. Department of Mathematics , University of Bologna , Bologna, Italy;2. Department of Computer Science , University of Bologna , Bologna, Italy |
| Abstract: | We study the validity of Hörmander's inequality for some classes of pseudo-differential operators for which the transversal ellipticity condition does not hold. |
| Keywords: | Fefferman–Phong inequality Hörmander inequality Lower bounds Pseudodifferential operators |