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3h
comment how to prove that $\ln(1+x)< x$
For lots of ideas, see math.stackexchange.com/questions/504663/…
5h
revised What does Dini continuity mean?
more tags
5h
answered What does Dini continuity mean?
1d
comment Strange Monte Carlo Sampling Phenomena
How are you calculating the standard deviation? Also, how fast does it increase or decrease?
Jul
25
comment If G is a finite abelian group and $a_1,…,a_n$ are all its elements, show that $x=a_1a_2a_3…a_n$must satisfy $x^2=e$.
This question is mostly a duplicate of math.stackexchange.com/questions/53026/finite-abelian-group
Jul
25
comment Product of all elements in finite abelian group equals its own inverse
Or better yet, math.stackexchange.com/questions/53026/finite-abelian-group
Jul
25
comment $(a_1 a_2 \cdots a_n)^2=e$ in a finite abelian group
Or better yet, math.stackexchange.com/questions/53026/finite-abelian-group
Jul
25
comment $(a_1 a_2 \cdots a_n)^2=e$ in a finite abelian group
I'm not going to nominate for closing, but this is a duplicate of math.stackexchange.com/questions/768246/…
Jul
25
comment Product of all elements in finite abelian group equals its own inverse
I'm not going to nominate for closing, but this is a duplicate of math.stackexchange.com/questions/768246/…
Jul
25
comment Prove this is a Connected Component
Prove that it's open, then prove that it's closed, then prove that it's connected.
Jul
25
comment Prove that $\alpha + \beta=\frac {\pi}{2}$
If you roll back this question so that it reads $\sin\alpha + \sin\beta$ again, the new question shouldn't be marked as a duplicate. The other benefits are that Michael Galuza's answer to this question will still be relevant, and the new question will get more visibility because it won't look like it's been answered already.
Jul
25
comment Prove that $\alpha + \beta=\frac {\pi}{2}$
Ah. At this point, you might be better off leaving this question as it was and asking a separate question. It's up to you...
Jul
25
comment Prove that $\alpha + \beta=\frac {\pi}{2}$
No, $\sin 30^\circ +\sin 60^\circ=(1+\sqrt3)/2$ is greater than $\sin 90^\circ=1$. How are you checking the validity of the statement?
Jul
25
comment Prove that $\alpha + \beta=\frac {\pi}{2}$
Is it even possible to satisfy (1) and (2)?
Jul
25
answered Can you tell me if this is a calculus problem?
Jul
25
answered Set numbering representation
Jul
24
answered Explaining elementary arithmetic in terms of group theory
Jul
23
revised What is wrong with my brute-force approach to proving that $\mathbb R$ as a metric space obeys the triangle inequality?
whoops, important typo for the record, z->y
Jul
23
reviewed Approve What is wrong with my brute-force approach to proving that $\mathbb R$ as a metric space obeys the triangle inequality?
Jul
23
answered What is wrong with my brute-force approach to proving that $\mathbb R$ as a metric space obeys the triangle inequality?