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1d
reviewed Close Best practice book for calculus
1d
reviewed Close Existence/non-existence of Holomorphic Function
1d
reviewed Reviewed Proof in modern algebra. Prove $(n-1)! = -1 \ (\textrm{mod n})$ iff n is prime
Apr
28
comment Right Triangle's Proof
@miracle173 Oops, wrong text. Thanks. I corrected it. Yes, I admit that your answer is better. (I upvoted it.) I didn't have time to make a more elegant answer, but I posted what I knew in the hopes that it might help the OP.
Apr
28
revised Right Triangle's Proof
added 8 characters in body
Apr
28
comment Right Triangle's Proof
See OEIS A046081 for more information.
Apr
28
revised Right Triangle's Proof
added 169 characters in body
Apr
28
answered Right Triangle's Proof
Apr
28
comment Right Triangle's Proof
A few are $(5,12,13)$, $(12,16,20)$, $(9,12,15)$, ...
Apr
28
reviewed Looks OK What is the Laurent expansion of f(z)=1/(z-3)?
Apr
28
comment Right Triangle's Proof
Are you familiar with Pythagorean triples? What triples that include 12 do you know?
Apr
26
reviewed Reviewed Generator Powers
Apr
26
comment Generator Powers
That's nice. So what is the question?
Apr
26
reviewed Looks OK Let $f\in L^p$. Can we say $\|f\|_{L^{p}} \leq \epsilon$ on $|x|\geq R$ for large $R$?
Apr
25
answered finding the growth rate for exponential growth
Apr
25
comment Evaluating $\lim\limits_{x \to -\infty} \sqrt{x^2 + 3x} - \sqrt{x^2 + x}$. Is Wolfram wrong or is it me?
Henning Makholm's comment above refers to the original post, where the first line was an equation involving infinity. The edit by rubik removed this line.
Apr
24
reviewed Close how to prove $\left( {\frac{1}{\sin z}} \right)^{2}=\sum_{-\infty}^{+\infty}\frac{1}{\left( {z-\pi n} \right)^2}$
Apr
24
comment Evaluating $\lim\limits_{x \to -\infty} \sqrt{x^2 + 3x} - \sqrt{x^2 + x}$. Is Wolfram wrong or is it me?
So, since $x<0$, when you divided the denominator by $\sqrt{x^2}$, you should have divided the numerator by $-x$.
Apr
24
answered Evaluating $\lim\limits_{x \to -\infty} \sqrt{x^2 + 3x} - \sqrt{x^2 + x}$. Is Wolfram wrong or is it me?
Apr
24
reviewed Close Markov Chain Market Share Model