This reduction also enables us to obtain some information about the number of colourings of a graph with a given set of colours. 這種化法也能使我們得到關(guān)于用給定的顏色集對一個(gè)圖的著(zhù)色的數目的某些信息。
Then the IIS after the object reduction is investigated through the set pair analysis.The attribute dependency is obtained and the attributes are further reduced. 用基于集對分析方法的改進(jìn)集對粗集模型對已進(jìn)行了對象約簡(jiǎn)的不完備信息系統進(jìn)行分析，找出各個(gè)屬性之間的依賴(lài)關(guān)系，進(jìn)一步進(jìn)行屬性約簡(jiǎn)。
