424 reputation
27
bio website
location Canberra
age
visits member for 2 years, 4 months
seen Mar 27 at 1:27

Third year maths/physics student at the Australian National University. Interested in maths and theoretical physics.


Jul
2
awarded  Curious
Apr
15
awarded  Yearling
Jun
15
comment Is there a name of this function?
Thanks guys! I reckon "inclusion map" is the one I was looking for(kind of forgot the term after years). The way I present it probably confused people. And that's probably the reason that you guys gave many different answers.
Jun
14
comment Is there a name of this function?
Thanks a lot Tom!
Jun
14
accepted Is there a name of this function?
Jun
13
asked Is there a name of this function?
Jun
10
comment This is correct? it is my project
@JgMc That's alright. I don't know how to express myself in Spanish either :p But I reckon what you did was correct(although you can prob follow a better and clearer approach). If you wonder what a better and clearer approach is, I suggest you check out Calculus by Stewart. Look at those examples that he did.
Jun
9
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
@TedShifrin Thanks Prof. Shifrin!
Jun
9
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
@user79365 Yes I meant locally diffeomorphic. Thanks for the suggestion. I'll think about it now.
Jun
9
comment Proper map on from compact manifolds
Thanks for the help!
Jun
9
accepted Proper map on from compact manifolds
Jun
9
comment This is correct? it is my project
@JgMc I don't understand what you're talking about. What do you mean by "all is step by step for any people"?
Jun
9
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
Also I don't think we can use the inverse function theorem. Because we don't know that they are manifolds a priori. Of course we can assume that they're manifolds, but then there are little point to do this question, because they're both diffeomorphic to $\mathbf R^2$.
Jun
9
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
Hi Thanks a lot for the help. Yeah I actually did the first two bits last night. But I got stuck on the third bit... And it seems impossible to me...
Jun
9
asked Proper map on from compact manifolds
Jun
9
answered This is correct? it is my project
Jun
9
revised Show that the tangent space of the diagonal is the diagonal of the product of tangent space
deleted 1711 characters in body
Jun
8
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
@HaraldHanche-Olsen Thanks Prof. Hanche-Olsen! I'll go find the explicit parametrisation. Thanks for the help!
Jun
8
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
@HaraldHanche-Olsen Btw Prof. Hanche-Olsen, I know your name from reading your notes on the Buckingham Pi Theorem more than a year ago. The notes you wrote were wonderful!
Jun
8
comment Prove that a standard torus is diffeomorphic to $ \mathbb S^1\times \mathbb S^1$
Hi Prof. Hanche-Olsen! The definition I had was "the set of points in $\mathbf R^3$ at distance $b$ from the circle of radius $a$ in the $xy$ plane, where $0<b<a$".