484 reputation
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location Madrid, Spain
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visits member for 1 year, 9 months
seen Nov 29 '13 at 21:53

M.S. Student at Universidad Complutense, Madrid.


Sep
24
awarded  Autobiographer
Jan
8
awarded  Yearling
Nov
29
awarded  Organizer
Nov
29
revised Tensor product, Artin-Rees lemma and Krull intersection theorem
I added a new tag.
Nov
29
suggested suggested edit on Tensor product, Artin-Rees lemma and Krull intersection theorem
Nov
3
awarded  Nice Answer
Apr
28
accepted Let $f: \mathbb{R}^n \rightarrow \mathbb{R}^m$ be differentiable a.e. Is $x \rightarrow Df(x)$ a Borel measurable function?
Apr
28
comment A continuous function from $\mathbb{R}$ to $\mathbb{R}$ that has fixed points at $kn^2$ where $n$ is prime and $k$ is integer
It makes no sense computing taylor series for a function that is not differentiable. Anyway, if you compute it in a neighbourhood of everypoint outside $A$ and $B$, then surely taylor series coincides with the function in that neighbourhood and all terms in the series but first and second will be $0$.
Apr
28
asked Let $f: \mathbb{R}^n \rightarrow \mathbb{R}^m$ be differentiable a.e. Is $x \rightarrow Df(x)$ a Borel measurable function?
Apr
28
comment A continuous function from $\mathbb{R}$ to $\mathbb{R}$ that has fixed points at $kn^2$ where $n$ is prime and $k$ is integer
As Clayton says, imagine you draw images for points in $A$ and $B$, now join those points by segments and you get the desired function. It is continuous by construction.
Apr
28
revised A continuous function from $\mathbb{R}$ to $\mathbb{R}$ that has fixed points at $kn^2$ where $n$ is prime and $k$ is integer
added 93 characters in body
Apr
28
answered A continuous function from $\mathbb{R}$ to $\mathbb{R}$ that has fixed points at $kn^2$ where $n$ is prime and $k$ is integer
Apr
12
awarded  Necromancer
Jan
18
revised The facts about $\varphi$
deleted 341 characters in body; edited title
Jan
17
revised The dimension of linear map
added 32 characters in body
Jan
17
revised The dimension of linear map
added 95 characters in body
Jan
17
comment The dimension of linear map
Since it is parametrized from $v \in P$ you can identify it with $P$ and $P$ is a k-dimensional subspace of $V$.
Jan
17
comment The dimension of linear map
Observe that a linear map is also a continuous function with respect to the topology induced by a norm in that vector space.
Jan
17
comment The dimension of linear map
What I try to point out is that both definitions are the same, with different notation: $v+Xv =(v, X(v))$
Jan
17
answered The dimension of linear map