Necessary and Sufficient Conditions for Hypoellipticity for a Class of Convolution Operators
Canadian journal of mathematics, Tome 46 (1994) no. 1, pp. 212-224

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In this paper the Corwin's conjecture is proved, which says that if d is a function analytic near ∞, then the hypoellipticity of the convolution operator Ad , defined by for every u ∊ S'(Rn ), implies that P(x)/ logx → ∞ as x → ∞, where P(x) is the distance from x ∊ Rn to the set of complex zeros of d.
DOI : 10.4153/CJM-1994-008-1
Mots-clés : 35H25, 22E27
Xuebo, Luo. Necessary and Sufficient Conditions for Hypoellipticity for a Class of Convolution Operators. Canadian journal of mathematics, Tome 46 (1994) no. 1, pp. 212-224. doi: 10.4153/CJM-1994-008-1
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