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its converse is also a function.
If A and B are sets,
* an <strong> * a <strong>surjection</strong> from A to B is a function whose ___domain is A and whose range is B.
* a <strong>bijection from A to B</strong> is an injection whose ___domain is A and whose range is B.
Notice that our terminology here adjusts for the fact that functions as we have defined
them do not determine their codomains.
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