The Direct Product of Graded Finite Posets
The Direct Product of Graded Finite Posets
摘要
A new concept Graded Finite Poset is proposed in this paper. Through discussing some basic properties of it, we come to that the direct product of graded finite posets is connected if and only if every graded finite poset is connected. The graded function of a graded finite poset is unique if and only if the graded finite poset is connected.
基金
Supported by the National Natural Science Foundation of China（60474022）
Supported by the Henan Innovation Project for University Prominent Research Talents（2007KYCX018）
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