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On the Upper Bound of Eigenvalues for Elliptic Equations with Higher Orders

✍ Scribed by Z.C. Chen; C.L. Qian


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
306 KB
Volume
186
Category
Article
ISSN
0022-247X

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## Abstract We study the wellposedness in the Gevrey classes __G__^__s__^ and in __C__^∞^ of the Cauchy problem for weakly hyperbolic equations of higher order. In this paper we shall give a new approach to the case that the characteristic roots oscillate rapidly and vanish at an infinite number of