if is any infinite set show that thats it thanks
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Originally Posted by jbpellerin if is any infinite set show that thats it thanks Not true, with the wording you have is permitted, and May be you mean: if is any finite set show that CB
Or if is an infinite set,
oops I meant X+N = X
Well, that depends on what you know about infinity. If you know there exists a such that , you can find a bijection between and (that just means is countable), and you've won. Indeed, you get (here means "equipotent to")
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