單值對應又稱“映射”。對於集合A中的任何一個元素,在集合B中都有唯一的元素與它對應,這種對應關係叫做從集合A到集合B的單值對應。如,A={1,2,3},B={4,6,8}。A的元素按對應關係x→2x+2與B的元素對應,是單值對應。A={-1,0,1},B={0,1,2,3},A的元素按對應關係x→x2與B的元素對應,也是單值對應。在從A到B的單值對應下,A中的元素所對應的B中的元素b,叫做a的象,a叫做b的原象。
基本介紹
- 中文名:單值對應
- 外文名:single valued correspondence
- 所屬領域:數學(集合論)
- 別名:映射
- 相關概念:集合、映射、對應等
基本介紹
定義
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舉例分析
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例題解析
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