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| 31. | self-adjoint elliptic differential operator |
| 自伴椭圆型微分算子 |
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| 32. | differential operator of the second kind |
| 第二类微分算子 |
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| 33. | operator differential equation |
| 算子微分方程 |
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| 34. | characteristic polynomial of a differential operator |
| 微分算子的特征多项式 |
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| 35. | differential operator of the first kind |
| 第一类微分算子 |
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| 36. | eigenvalue and eigenfunction of partial differential operator |
| 偏微分算子的特征值与特征函数 |
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| 37. | principal part of a differential operator |
| 微分算子的主部 |
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| 38. | For the location of the outer brim, we adopt the differential and integral operator grounded on the gray |
| 对于外边缘定位采用基于灰度梯度的微分积分圆形检测算子的方法. |
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