L3_A
2.2 Interior of a set
(1)元素x的位置與子集A的關係
2.2 Interior of a set(cont.)
2.2 Interior of a set(cont.)
2.3 Closed sets
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Syllabus
L3_A
2.2 Interior of a set
(1)元素x的位置與子集A的關係