Prove that R ⊂ X x Y is a bijection between the sets X and Y, when R(adsbygoogle = window.adsbygoogle || []).push({}); ^{−1}R= I: X→X and RR^{-1}=I: Y→Y

Set theory is a quite a new lesson for me. So I am not good at proving different connections, but please give me a little help with what to start and so.. I have read the book and I know what bijection means but just..

I would be very very thankful. Getting a good example proof or just some tips what to do would improve my skills also I hope :)

Thank you in advance!

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# Prove a bijection.

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