In Section 4, we study the nullity functions of poset matroids.
在第4节研究了偏序集拟阵的零度函数。
The structure and properties of fuzzy matroids are investigated further.
进一步研究了模糊拟阵的性质和结构问题。
Spanning trees of graphs and bases of matroids are basic objects in combinatorial theory.
图的支撑树及拟阵的基都是组合理论的基本研究对象。
In Section 5, we use the corank function of poset matroids to investigate the relationship between a poset matroid and its dual.
在第5节，我们用偏序集拟阵的余秩函数来研究偏序集拟阵与其对偶之间的关系。
Fuzzy matroids is a theory which is set up by introducing the notion "fuzzy" into theory of matroid, it has existed nearly 20 years old.
模糊拟阵是将“模糊”的概念引入到拟阵理论中而建立起来的理论，已有近20年的历史。
It is shown that the categorical isomorphisms in the category of matroids with either rank strong maps or strong maps as morphisms are isomorphisms in matroids sense.
以秩强映射或强映射为态射的拟阵范畴中的范畴同构都是拟阵同构。
Several important properties of fuzzy close sets and fuzzy closure operator are derived by analyzing and investigating relativity, closure operators and fuzzy close sets in the fuzzy matroids.
通过对模糊拟阵的相关性、闭包算子和模糊闭集的研究，得到了模糊闭集和模糊闭包算子的几个重要性质。
Several important properties of fuzzy close sets and fuzzy closure operator are derived by analyzing and investigating relativity, closure operators and fuzzy close sets in the fuzzy matroids.
通过对模糊拟阵的相关性、闭包算子和模糊闭集的研究，得到了模糊闭集和模糊闭包算子的几个重要性质。
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