Based on the clear set theory,this paper illustrates the incompleteness of the operation of equality and inclusion and join and intersection on fuzzy set and the reasons.
以清晰集理论为基础,阐明了模糊集合中的相等、包含、并、交等运算的不完备性(即词不达意)和产生的原因,进而阐明模糊集中的排中律(互补律)不成立,是个错误的结论。
In the paper we study the equality among the former two types of fuzzy implication operators defined and S-implication.
Weber介绍了三类模糊蕴涵算子,据此,本文讨论了其前两种类型的模糊蕴涵算子及S-蕴涵算子三者之间的相等问题,并利用强DeMorgan三元组的性质,给出了两两相等的充要条件。
Using two dimensional function as an example the writer gives two sufficient conditions for mixing partial diffevential coefficient equality.
以二元函数为例讨论混合偏导数相等的条件,给出了两个比现行教材中更弱的混合偏导数相等的充分条件。
