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given two sets $A$ and $B$. How do we construct a set $C$ bijective to $B$, but disjoint to $A$?

Asaf Karagila
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1 Answers1

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For example, let $$ C=\{\,\{x,A\}\mid x\in B\,\}.$$

Hagen von Eitzen
  • 374,180
  • Thank you! The rest follows with https://math.stackexchange.com/questions/676121/are-there-sets-a-and-b-such-that-a-in-b-and-b-in-a –  Apr 20 '21 at 17:52