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Prove that spheres in $2$ and $3$ dimensions are not homeomorphic.


Homework question on whether two quotient spaces are homeomorphicWhich of the following pairs of sets are homeomorphic of the following?Showing that two Banach spaces are homeomorphic when their dimensions are equal.$X$ and $Y$ are homeomorphic. Show that also their one-point compactifications are homeomorphic.Find homeomorphic and non-homeomorphic pairs among the spaces $A, B$ and $C$.Is the following pairs of set are homeomorphic?Are $mathbbQ$ and $mathbbZ$ homeomorphic?Different p-adic topologies on $mathbbQ $ are homeomorphicIf $n>m$, then the spheres $S^n$ and $S^m$ are not homeomorphic?Show two topological spaces are homeomorphic













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The spaces $S^1$ and $S^2$, with their topologies inherited from $mathbb R^2$ and $mathbb R^3$, respectively, are not homeomorphic. Here $S^1$ and $S^2$ are spheres in $2$ and $3$ dimension.










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$endgroup$
















    0












    $begingroup$


    The spaces $S^1$ and $S^2$, with their topologies inherited from $mathbb R^2$ and $mathbb R^3$, respectively, are not homeomorphic. Here $S^1$ and $S^2$ are spheres in $2$ and $3$ dimension.










    share|cite|improve this question











    $endgroup$














      0












      0








      0





      $begingroup$


      The spaces $S^1$ and $S^2$, with their topologies inherited from $mathbb R^2$ and $mathbb R^3$, respectively, are not homeomorphic. Here $S^1$ and $S^2$ are spheres in $2$ and $3$ dimension.










      share|cite|improve this question











      $endgroup$




      The spaces $S^1$ and $S^2$, with their topologies inherited from $mathbb R^2$ and $mathbb R^3$, respectively, are not homeomorphic. Here $S^1$ and $S^2$ are spheres in $2$ and $3$ dimension.







      general-topology






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      edited Mar 14 at 8:42









      Asaf Karagila

      306k33438769




      306k33438769










      asked Mar 14 at 6:31









      Mittal GMittal G

      1,379516




      1,379516




















          2 Answers
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          active

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          5












          $begingroup$

          If you remove two points from $S^1$ it becomes disconnected. But if you remove two points from $S^2$ it does not become disconnected.






          share|cite|improve this answer









          $endgroup$




















            4












            $begingroup$

            Remove two points from $S^1$ and it's not connected. Remove two points from $S^2$ and it remains connected.






            share|cite|improve this answer









            $endgroup$












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              2 Answers
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              2 Answers
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              active

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              5












              $begingroup$

              If you remove two points from $S^1$ it becomes disconnected. But if you remove two points from $S^2$ it does not become disconnected.






              share|cite|improve this answer









              $endgroup$

















                5












                $begingroup$

                If you remove two points from $S^1$ it becomes disconnected. But if you remove two points from $S^2$ it does not become disconnected.






                share|cite|improve this answer









                $endgroup$















                  5












                  5








                  5





                  $begingroup$

                  If you remove two points from $S^1$ it becomes disconnected. But if you remove two points from $S^2$ it does not become disconnected.






                  share|cite|improve this answer









                  $endgroup$



                  If you remove two points from $S^1$ it becomes disconnected. But if you remove two points from $S^2$ it does not become disconnected.







                  share|cite|improve this answer












                  share|cite|improve this answer



                  share|cite|improve this answer










                  answered Mar 14 at 6:33









                  Kavi Rama MurthyKavi Rama Murthy

                  68.6k53169




                  68.6k53169





















                      4












                      $begingroup$

                      Remove two points from $S^1$ and it's not connected. Remove two points from $S^2$ and it remains connected.






                      share|cite|improve this answer









                      $endgroup$

















                        4












                        $begingroup$

                        Remove two points from $S^1$ and it's not connected. Remove two points from $S^2$ and it remains connected.






                        share|cite|improve this answer









                        $endgroup$















                          4












                          4








                          4





                          $begingroup$

                          Remove two points from $S^1$ and it's not connected. Remove two points from $S^2$ and it remains connected.






                          share|cite|improve this answer









                          $endgroup$



                          Remove two points from $S^1$ and it's not connected. Remove two points from $S^2$ and it remains connected.







                          share|cite|improve this answer












                          share|cite|improve this answer



                          share|cite|improve this answer










                          answered Mar 14 at 6:33









                          Robert ShoreRobert Shore

                          3,225323




                          3,225323



























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