Re: No homeomorphism (0,1) <--> [0,1]



In article <3ob7q4F54kquU1@xxxxxxxxxxxxxx>, Jose Carlos Santos writes:
>On 08-09-2005 17:34, Michael Stemper wrote:
>
>> I'm trying to prove that there isn't a homeomorphism between [0,1]
>> and (0,1), and I'm stuck. What I know so far is the definitions of
>> homeomorphism and continuity.
>
>Suppose that there was a homeomorphism f:[0,1] --> ]0,1[. It's
>continuous, and so, by Weierstrass' theorem,

Thanks for the reply. However, all that I've learned so far is the
definitions of metric space, continuity, and homeomorphism. I certainly
haven't encountered this theorem yet.

For anybody playing along at home, this exercise is a post script
to Exercise C, Chapter III, in _Topology_, by George McCarty.


--
Michael F. Stemper
#include <Standard_Disclaimer>
This sentence no verb.

.



Relevant Pages

  • Re: No homeomorphism (0,1) <--> [0,1]
    ... >I'm trying to prove that there isn't a homeomorphism between ... >homeomorphism and continuity. ... All the flie in, so the limit, ... x because f is a bijection and y is not equal to 0. ...
    (sci.math)
  • No homeomorphism (0,1) <--> [0,1]
    ... I'm trying to prove that there isn't a homeomorphism between ... Let y be any point in M' such that y>B, and a neighborhood of y, n', ... definition of continuity as I understand it. ... Outside of a dog, a book is man's best friend. ...
    (sci.math)
  • Re: No homeomorphism (0,1) <--> [0,1]
    ... >>homeomorphism and continuity. ... especially based upon what McCarty has given so far. ... at the end of a simple exercise to show that all open intervals ...
    (sci.math)
  • Re: No homeomorphism (0,1) <--> [0,1]
    ... >definitions of metric space, continuity, and homeomorphism. ... their convergence and their non- ... suggestion. ...
    (sci.math)
  • Re: No homeomorphism (0,1) <--> [0,1]
    ... >>> and, and I'm stuck. ... >>continuous, and so, by Weierstrass' theorem, ... >definitions of metric space, continuity, and homeomorphism. ...
    (sci.math)