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| THE L~2-BOUNDEDNESS OF PSEUDODIFFERENTIAL OPERATORS WITH NONSMOOTH COEFFICIENT SYMBOLS | |
| 作者姓名： | 李得宁 |
| 作者单位： | Dept. of |
| 基金项目： | Project supported by the Science Fund of the Chinese Academy of Sciences. |
| 摘 要： | §1. Introduction In application of nonlinear boundary value problems, it is sometimes important to know that L~2-boundedness of a class of pseudo-differential operators with symbols whioh have nonsmooth coefficients. In 2], Coifman and Meyer proved that the operator σ(x, D) is bounded in L~2(R~n) if its symbold (x, ξ) satisfies: |
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