A very satisfactory answer can be given in terms of the appropriate analytic generalization of the algebraic concept of nilpotence . 将代数学中的幂零元概念作适当的解析学上的推广,可以绘出一个很满意回答。
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Signs and symbols . elementary algebra and analysis . analytical geometry and vector analysis 标记和符号.初等代数和解析学.解析几何和向量分析