一种将定义域中的每个元素映射到值域中不同元素的函数；单射函数。
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一种将定义域中的每个元素映射到值域中不同元素的函数；单射函数。；一种将定义域中的每个元素映射到值域中不同元素的函数；单射函数。
A function that maps each element of its domain to a distinct element of its codomain; an injective function.
In algebra, a one-to-one function has the property that if f(a)=f(b) then a=b.
在代数中,一对一函数具有性质:如果f(a)=f(b),则a=b。
一种将定义域中的每个元素映射到值域中不同元素的函数；单射函数。
A function that maps each element of its domain to a distinct element of its codomain; an injective function.
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