在第4节研究了偏序集拟阵的零度函数。
In Section 4, we study the nullity functions of poset matroids.
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.
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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