在求解由刘过程驱动的模糊微分方程时，需要研究一类新的模糊微分（刘微分）的性质．给出了
模糊微分的２个中值定理和４个模糊微分公式，并且将这些结论推广到复模糊微分的情形．这些工作为模
糊微分方程理论的完善和应用奠定了基础．
To solve fuzzy differential equation driven by Liu process， some properties of a new kind of fuzzy differential (Liu differential) are needed. Two mean value theorems of fuzzy differential and four fuzzy differential formulas are given in this paper. Furthermore， these conclusions are extended to the case of complex fuzzy process. The studies above laid a theoretical foundation for calculation and application of the fuzzy differential equation.
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