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滿射函數

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滿射函數

滿射函數英文surjective function),係數學上嘅一類函數,一個函數 係滿射即係話對於對應域 入面任意一個元素 ,係函數嘅定義域 入面都最少有一個元素 使到 。注意,嗰個元素 唔一定要係唯一, 亦即係話,滿射唔一定要係單射

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