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visits member for 1 year, 11 months
seen Jan 16 at 15:16

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
Aug
30
answered is $\{(x,y) : x,y \in \mathbb{Z} \}$ a closed set?
Aug
28
awarded  Nice Answer
Aug
27
accepted A functional structure on the graph of the absolute value function
Aug
27
comment A functional structure on the graph of the absolute value function
I think I follow, but just in case, could you clarify what you mean when saying "Lipschitz at $(0,0)$".
Aug
27
revised “Coordinate functions” on the structure-sheaf definition of a smooth manifold
Added links
Aug
27
comment “Coordinate functions” on the structure-sheaf definition of a smooth manifold
No problem. I edited the question and added some links to questions related to the problems of the section you are reading. I am myself stuck on problem 5 p.71 (see the last link I added at the end of my answer)
Aug
24
comment Partition of Unity in Spivak's Calculus on Manifolds
@Pratyush: I have looked at this more carefully and updated my answer.
Aug
24
revised Partition of Unity in Spivak's Calculus on Manifolds
Clarification of ideas
Aug
24
revised Partition of Unity in Spivak's Calculus on Manifolds
Clarification