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age 26
visits member for 3 years, 7 months
seen 4 hours ago

Feb
24
answered Why is there antagonism towards extended real numbers?
Feb
15
comment What's the intuition behind Pythagoras' theorem?
"If at all possible, find a better teacher" - You shouldn't reinforce the OP's disrespect of his/her teacher based on a single quote you didn't hear directly.
Feb
6
awarded  Notable Question
Dec
29
comment Evaluating $\lim_{n\to \infty } \, \left(\sum _{k=1}^{\infty } \frac{1}{n}\right)$
A calculus example of such a use of $\infty$ is the pretty common (and easy to memorize) definition of $\limsup_{n\rightarrow\infty}x_n$ as $\lim_{n\rightarrow\infty}\sup_{k\geq n}x_k$.
Oct
17
awarded  Nice Answer
Sep
13
awarded  Yearling
Jul
21
comment Left Multiplication Ring Homomorphism
You mean a ring without unity, right?
Jul
11
comment fixed lines of a collineation with exactly one fixed point
Thank you very much!
Jul
11
accepted fixed lines of a collineation with exactly one fixed point
Jul
10
asked fixed lines of a collineation with exactly one fixed point
Jul
6
comment Proving that Tensor Product is Associative
That's right! Don't forget, however, that not every element of $Y\otimes Z$ is of the form $y\otimes z$.
Jul
6
comment Proving that Tensor Product is Associative
First Step: Show that, for every $x$, the mapping $(y,z)\mapsto(x\otimes y)\otimes z$ is bilinear.
May
8
awarded  Caucus
May
6
awarded  Tumbleweed
Apr
29
asked Affine subspaces in characteristic 2
Mar
10
comment Making some standard theoretical physics argument rigorous
@Guiseppe: It's not, you're right. My proof is flawed.
Mar
10
answered Making some standard theoretical physics argument rigorous
Mar
10
accepted If $x\otimes y=0$, then $x\otimes y=0$ in the tensor product of finitely generated submodules
Mar
9
revised If $x\otimes y=0$, then $x\otimes y=0$ in the tensor product of finitely generated submodules
edited title
Mar
9
asked If $x\otimes y=0$, then $x\otimes y=0$ in the tensor product of finitely generated submodules