It is known that poset theory is important to the study on greedoid theory.
摘要众所周
，
集理
在
究广义拟
起着重要作用。
It is known that poset theory is important to the study on greedoid theory.
摘要众所周，集理在究广义拟起着重要作用。
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?
众所周,集理在究广义拟起着重要作用.但是集理与不同种广义拟间的包含关系的直接联系是什么呢?
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