1.It is known that poset theory is important to the study on greedoid theory.
摘要众所周知，偏序集理论在究义拟阵论中起着重要作用。
2.It is known that poset theory is important to the study on greedoid theory.But what is the direct relation between poset theory and the containment relations between different kinds of greedoids?
究
义拟阵论中起着重要作用。
义拟阵
：
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