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| ON THE POSITIVE DEFINITENESS OF A CLASS OF OPERATORS | |
| 作者姓名： | 武际可 袁勇 |
| 作者单位： | Department of Mechanics，Peking University，Beijing，Department of Mechanics，Peking University，Beijing |
| 摘 要： | In this paper,a proof of the positive definiteness for a class of operators is given.Theoperators considered are general enough to include those in two-and three-dimensionalelasticity,thin plates and shells as their special cases. |
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