Thursday, August 18, 2016

elementary set theory - Is mathbbR2 equipotent to mathbbR?

I know that N2 is equipotent to N (By drawing zig-zag path to join all the points on xy-plane). Is this method available to prove R2 equipotent to R?

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analysis - Injection, making bijection

I have injection f:AB and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...