Wednesday, September 21, 2016

real analysis - bijective measurable map existence


Does there exist bijective measurable maps between R and Rn?


If so, could you give me an example of that?


Thank you.


Answer



Polish space is a topological space that is isomorphic to a complete separable metric space, for example Rn for any nN. For the proof of the following fact, see e.g. here.



Any uncountable Polish space is Borel isomorphic (there exists a bimeasurable bijection) to the space of real numbers R with standard topology.




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