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I am a graduate student at UCLA.


13h
comment Which is the identity element of $S_3 \times S_3$ (that has 36 elements)?
@coffeemath That doesn't mean it's worth a downvote. Just not be worth an upvote. I should think a downvote should be reserved for answers that are incorrect, or poorly formatted, or in some other way harmful.
14h
comment Which is the identity element of $S_3 \times S_3$ (that has 36 elements)?
uh, why the downvote on this answer... ?
Nov
19
comment Why is indefinite integral called so?
The connection between them is given by the fundamental theorem of calculus.
Nov
18
answered Proving Product rule with Abstract Algebra Methods
Nov
16
comment Definition of orientation preserving linear map: is this welldefined?
It's only well-defined for a linearly independent pair of vectors in the plane.
Nov
16
comment Why have so many people ignored the recent proof of the Riemann hypothesis?
Pages 7 through... the end. This is, without a doubt, the most beautiful piece of TeX I have ever seen.
Nov
15
comment How many $\mathbb R$s must a Mathematician walk down?
Also, it's pretty easy to get "far" from the origin; If your meter currently reads $d$ and you want to get at least distance $N$ away from the origin, you just travel a distance of $N+2d$ in any direction.
Nov
15
comment How many $\mathbb R$s must a Mathematician walk down?
@tomasz In addition to what you've said, he is blind to where the real axis is; the data he has access to only helps him to find, roughly, the origin and concentric circles at integer distances from the origin.
Nov
15
comment principal ideals explanation question
For the particular case of $\sqrt 2$, $\mathbf Z[\sqrt 2] = \{a+b\sqrt 2\mid a, b \in \mathbf Z\}$. For more general numbers $\alpha$ in place of $\sqrt 2$, higher powers of $\alpha$ may be necessary.
Nov
15
comment principal ideals explanation question
It's the set of polynomials in $\sqrt 2$ with coefficients in $\mathbf Z$.
Nov
15
comment principal ideals explanation question
well, yes to $n\mathbb Z$, and $2\mathbb Q$ is indeed a principal ideal in $\mathbb Q$, but... it's equal to all of $\mathbb Q$, because $2$ is a unit in $\mathbb Q$.
Nov
15
comment principal ideals explanation question
an ideal that is generated by a single element.
Nov
12
comment Addition in linear vector spaces
Actually, it's a subtle fact that commutativity of addition follows from the remaining axioms of a vector space ($2(a+b) = 2a+2b= a+a+b+b$ on the one hand and $2(a+b) = a+b+a+b$ on the other hand).
Nov
11
reviewed Approve suggested edit on How to prove that $abd = abcd + abc'd$ for all general occassions
Nov
11
comment How to prove that $abd = abcd + abc'd$ for all general occassions
$abcd+abc'd = abd(c+c') = abd(1) = abd$.
Nov
10
answered Do we know if all simple extensions of the field of rational numbers by transcendental numbers are not equal?
Nov
9
comment Does a ring map $f:R\to S$ induce a homomorphism $GL_n(R)\to GL_n(S)$?
Yes, you are on the right track.
Nov
9
answered Are there any finite non-abelian group with one subgroup of each size ?
Nov
6
comment Could the Riemann hypothesis be provably unprovable?
@user2345215 Jose Arnaldo Dris's Math Overflow link demonstrates that the falsehood of RH implies that it is provably false.
Nov
5
awarded  Yearling