That was this symbolic vector operator in which the components are the partial derivative operators.
这个是符号化的向量算子，其中它的分量是偏微分算子。
By reducing the MREIT problem to a nonlinear operator equation, the formal derivative of the operator and the formula of solution for linearization problem are given.
通过将问题化为非线性算子方程，推导出算子的形式导数，给出了线性化问题解的等价表达。
In chapter 3, we set some new conceptions of G-derivative, and make a research on the relations among these new derivatives and the convexity of an operator.
第三章提出了一些新的G -可微概念，并研究了算子的凸性与这些新的可微性之间的关系。
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