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Jun
15
comment Closed Form Solution for Minimization involving Standard Normal CDF and PDF
@Did it looked differently when i wrote the solution, i made a mistake. not sure about the other question
Jun
11
comment Solving this Inequation
@MikhaelM please see update, taking logs making things very basic
Jun
11
comment converting asymptotic little-oh into big-oh
If $f(n) \cdot n^{1/4-\epsilon} \to 0$ then $f(n) = O(n^{-1/4})$, not $O(n^{1/4})$ as you have claimed
Jun
11
comment How many arithmetic operations are required to do this polynomial division?
depnds on the degree of $p$?
Jun
11
comment converting asymptotic little-oh into big-oh
in std notation, $f(n) = O(n^{-1/4})$
Jun
11
comment Probability of not choosing from a lot
that's not what it says in the question -- "10 out of every 1000 are defective" but i can see how you want to interpret it like that. i wasn't the one who downvoted btw
Jun
11
comment Probability of not choosing from a lot
@BelginFish see the update...
Jun
11
comment Probability of not choosing from a lot
this is wrong. when you've picked the first one, the odds for the second one change
Jun
11
comment Probability of not choosing from a lot
Please add your own thoughts on the problem. People here don't usually like to do your hw for you
Jun
11
comment Find $\lim\limits_{x\to \infty} \frac{x\sin x}{1+x^2}$
@JesterTran yes. Exactly
Jun
11
comment Find $\lim\limits_{x\to \infty} \frac{x\sin x}{1+x^2}$
@JesterTran LHospital cannot be used when limits don't exist. You need too make s bonding argument like shown in other answers
Jun
11
comment Find $\lim\limits_{x\to \infty} \frac{x\sin x}{1+x^2}$
@JesterTran it is neither $+\infty$ or $-\infty$, it does not exist...
Jun
11
comment Find limit of the quotient
This doesn't quite work -- note that in your case you have $-\infty$ instead of $N$. What is the definition of such a limit?
Jun
10
comment What's wrong with this?
@Thomas i suppose he is trying to argue that $e^x = 1$ implies $x=0$, which is obviously problematic in complex arithmetic. Not sure what he needs the logs for.
Jun
10
comment Prove $\lim\limits_{n\to\infty}\frac{1}{\sqrt[n]{n!}}=0$
it is right, not sure of other approaches
Jun
10
comment $e^{X_t - \frac{t^3}{6}}$ is a martingale - show it
what is the SDE for $X_t$?
Jun
10
comment Using Union to prove a context-free language?
@sci1991 yes, that is the usual way
Jun
10
comment Stable matching solutions
please clarify your question
Jun
10
comment Using Union to prove a context-free language?
I agree that $L_1 \cup L_2 = L_2$, which happens because $L_1 \subset L_2$. Both are CFL -- but what new information does this give you? What are you trying to conclude that you don't know before your union argument?
Jun
10
comment Finding the number of primes numbers using exclusion/inclusion principle: What am I doing wrong?
can you elaborate on the basis of what you are using incl/excl? # of divisors?