I need to prove that there exist a one-to-one function: where should i start? thanks in advanced!
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try picking a function that maps an element a to (a,___) (i'll leave it to you to decide what might go in the blank).
do i just need to provide an example of a function that goes from ? (like or ...) im not sure what exactly do i need to prove here...
Originally Posted by Stormey do i just need to provide an example of a function that goes from ? (like or ...) im not sure what exactly do i need to prove here... 'Fix' a . Then define by . Now prove is one-to-one.
And note that the original claim is false when B is empty but A is not.
Thanks guys. appreciate it!
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