Reputation
13,871
Top tag
Next privilege 15,000 Rep.
Protect questions
Badges
2 12 28
Newest
 Copy Editor
Impact
~199k people reached

Nov
6
revised Meaning of $\mathbb{Z}\left[\sqrt{3}\right]$?
added 35 characters in body; edited title
Nov
6
comment Proving an inequality which looks like we could use Bernoulli's inequality
@A6Tech This about itm here is a hint: $$\frac{1}{2^k} + \frac{1}{2^k} = \frac{2}{2^k} = \frac{1}{2^{k-1}}.$$ so for example $$\frac{1}{16} + \left(\frac{1}{16} + \frac{1}{8} + \frac{1}{4} + \frac{1}{2} + 1 \right) = 2$$ If you are into doing this quickly, just sum the geometric series on the left-hand side
Nov
6
answered Proving an inequality which looks like we could use Bernoulli's inequality
Nov
6
revised Proving an inequality which looks like we could use Bernoulli's inequality
added 11 characters in body
Nov
6
revised using squeeze theorem on $\sin(\frac{1}{n})$
added 14 characters in body
Nov
6
comment equality constraints in robust optimization
What do you call robust form?
Nov
6
reviewed Leave Open Does $\mathbb E(X_1)\geq\mathbb E(X_2)$ imply $\mathbb E(\textbf1_{X_1>1})\geq\mathbb E(\textbf1_{X_2>1})$ for real-valued random variables $X_1,X_2$?
Nov
6
revised How can I show that this sequence of integrals goes to zero?
added 8 characters in body
Nov
5
comment Finding the limit of $f(x)$ defined differently for rationals and irrationals as $x\rightarrow\frac{1}{2}$
@dable You need the contrapositive of that, which needs to be stated explicitly.
Nov
5
comment Finding the limit of $f(x)$ defined differently for rationals and irrationals as $x\rightarrow\frac{1}{2}$
@dable to show $$\lim_{x \to a} f(x) \ne b$$ you would still need to show that it is possible to get arbitrarily close to $a$ while not getting closer to $b$. Your proof fails to explicitly do that.
Nov
5
revised Finding the limit of $f(x)$ defined differently for rationals and irrationals as $x\rightarrow\frac{1}{2}$
added 11 characters in body
Nov
5
answered Finding the limit of $f(x)$ defined differently for rationals and irrationals as $x\rightarrow\frac{1}{2}$
Nov
5
revised Graph, vertex cover problem
added 233 characters in body; edited tags
Nov
4
revised Calculate the Expected Return in the Limit as $n \to \infty$
edited title; edited tags
Nov
4
revised Why is it okay to omit the limits on some definite integrals?
edited tags
Nov
4
revised Formula to project a vector onto a plane
added 131 characters in body
Nov
4
comment Find the sum $\sum_{j=0}^{n}j$
@jukka.aalto first term in your sum and last term added together are $n+1$. Next pair is $2 + (n-1) = n+1$. etc
Nov
4
answered Find the sum $\sum_{j=0}^{n}j$
Nov
4
revised Brownian motion in $2$ dimensions on the plane
added 23 characters in body
Nov
4
answered Continuous probability; find the probability density function