Thursday, 17 November 2016

general topology - Is a continuous bijection function from a hausdorff space to a compact space a homeomorphism?

We know a continuous bijection from a compact space to a Hausdorff space is always a homeomorphism.



But I am wondering what happens if we switch the domain and codomain. Is a continuous bijection function from a Hausdorff space to a compact space a homeomorphism?



What I think this is not true. Consider the example f:R[π2,π2] defined by f(x)=tan(x), then f is a continuous bijection but f1 is not continuous.




Am I right? Thank you for any comments.

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