目的建立一种基于拟序关系的推广的粗糙集模型。
Aim To establish a generalized model of rough set theory based on quasi order relation.
对拟内正则序半群给出了在理想和格林关系理论方面的若干刻划。
Ideal and Greens relation theoretical characterizations of quasi intra regular ordered semigroups are given.
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。
In Section 5, we use the corank function of poset matroids to investigate the relationship between a poset matroid and its dual.
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