John
Reputation
1,365
Next privilege 2,000 Rep.
 Apr 29 awarded Yearling Jan 12 awarded Popular Question Nov 12 awarded Popular Question May 21 awarded Nice Question May 20 awarded Necromancer Apr 29 awarded Yearling Jul 3 awarded Notable Question Jul 2 awarded Curious Apr 29 awarded Yearling Sep 13 asked How to find a homeomorphism $\mathbb{R}^{n}\rightarrow\mathbb{R}^{n}$ having certain properties Sep 12 comment Typo or additional hypotheses needed in problem 5, p.71 of Bredon's Topology and Geometry? I edited the question. It may be possible that the map you define is not an isomorphism after all. Sep 12 revised Typo or additional hypotheses needed in problem 5, p.71 of Bredon's Topology and Geometry? Possible counterexample found Aug 31 accepted Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Aug 31 revised Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Title change Aug 30 comment Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Very elegant, +1! Aug 30 revised Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Examples incorrect Aug 30 comment Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Yes, you are absolutely right. I edited the question. Aug 30 asked Is there a cantor set in $\mathbb{R}^{n}-\{0\}$ which intersects every ray from the origin? Aug 30 revised is $\{(x,y) : x,y \in \mathbb{Z} \}$ a closed set? Typo corrected Aug 30 revised is $\{(x,y) : x,y \in \mathbb{Z} \}$ a closed set? Typo corrected