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On the Cauchy Problem for Hyperbolic Operators with Double Characteristics |
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| Authors: | Cesare Parenti |
| Affiliation: | Department of Computer Science , University of Bologna , Bologna, Italy |
| Abstract: | We show that for a class of hyperbolic second order operators with double characteristics the Ivrii–Petkov condition is also sufficient for the well-posedness of the Cauchy problem in C ∞. |
| Keywords: | Cauchy problem Ivrii–Petkov condition Weakly hyperbolic operator |