Marra

Brazil

Brazilian graduate student.

48m
comment Klein Bottle Embedding on $\mathbb{R}^4$.
@OlivierBégassat See books.google.com.br/… at page 25, example 4.9 (b). It refers to example 4.8 to build quotient manifolds (over discontinuous actions of groups), which is also in this preview. But he uses the Antipode mapping $A$ and the isomorphism group $\{ Id, A\}$ to obtain the Klein Bottle from the Torus, and it wasn't working
1h
comment Klein Bottle Embedding on $\mathbb{R}^4$.
@OlivierBégassat Right, but the question remains, that is, this maps acts noncontinuously over the torus, and I don't know if the quotient space is equal to the Klein Bottle. If this is true, then G is well defined over the Klein Bottle and everything's fine.
1h
comment Klein Bottle Embedding on $\mathbb{R}^4$.
@OlivierBégassat Sorry about that. I was asking if the quotient of the torus over the action of the map $(x,y)\mapsto (x,-y)$ equals the Klein Bottle?
1h
comment Klein Bottle Embedding on $\mathbb{R}^4$.
But what would that mean? Does the quotient of the torus over the action of this map is equal to the Klein Bottle?
1h
asked Klein Bottle Embedding on $\mathbb{R}^4$.
2d
accepted Counterexample for Hartogs' Extension Theorem
2d
comment Counterexample for Hartogs' Extension Theorem
I'll check those. Thanks for the help! :)
2d
comment Counterexample for Hartogs' Extension Theorem
When you say "it is", do you mean that "\Omega/K" IS connected or is not connected? Also, I didn't say that $K$ is compact. I said that $K$ is relatively compact in $\Omega$. Why isn't it?
Apr
15
asked Counterexample for Hartogs' Extension Theorem
Apr
10
accepted What's the sense in a Hyperelliptic Riemann Surface?
Apr
4
comment What is the difference between $\mathcal B(E\times F)$ and $\mathcal B(E)\bigotimes\mathcal B(F)$
Is that a tensor product. Sure looks like a tensor product.
Apr
2
comment What's so special about $+$?
I am with @DanielRust in this one.
Apr
2
comment What's so special about $+$?
I think you meant "many other $\mathbb{N}^2\rightarrow \mathbb{N}$".
Mar
26
asked Exercises for the text "Introduction to Holomorphic Functions of Several Complex Variables"
Mar
21
comment What is the canonical isomorphism for $T^k_l$
Thanks @dc2814 I was looking for this :)
Mar
19
comment Isomorphism between $T^k_{l+1}(V)$ and $\mathcal{L}\left( (V^*)^k \times (V)^l\right)$.
It's on the question, "Please note that $(V)^l = V\times ... \times V$, l times", the Euclidean product of vector spaces.
Mar
19
asked Isomorphism between $T^k_{l+1}(V)$ and $\mathcal{L}\left( (V^*)^k \times (V)^l\right)$.
Mar
17
awarded Yearling
Mar
17
awarded Yearling
Dec
16
awarded Nice Question
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