Mathematics
Profile Activity
Meta user
Network profile
Tom Chen
Summary Answers Questions Tags Badges Bookmarks Bounties Reputation All actions

82 Answers

Votes Activity Newest
9
A sum of Fibonacci numbers
Feb 4 '19 at 23:06
6
The upper bound of $\lim \limits_{n\to\infty} \sum \limits_{i=1}^n e^{-i}\sqrt{i}$?
Apr 8 '19 at 17:37
5
Dice: Rolling at least N successes where number of succeses vary by dice value
Jun 27 '20 at 16:54
5
Functional equation $ (n+1) f(n+1)= (a n+b) f(n) $ for $n=0,1,…$
Feb 9 '19 at 2:15
4
Expectation of $\min(X,Y)$ conditional on $\max(X,Y)$
Jun 26 '20 at 4:29
4
Let $X_1$ and $X_2$ be uniform on $n$-spheres. What is the distribution of $\| X_1+X_2\|$?
Apr 24 '19 at 17:54
4
No non-negative continuous function on $[a,b]$ such that $\int_a^b f(t)dt=1, \int_a^b tf(t)dt=c, \int_a^b t^2f(t)dt=c^2$ for $c\in\mathbb{R}$.
Mar 5 '19 at 19:11
4
Stability of Tikhonov Regularization
Feb 4 '19 at 19:11
4
Asymptotic expansion of the sequence $u_n=\sum\limits_{k=1}^{n}e^{-b^{-k}}$
Feb 2 '19 at 17:19
4
For $x+y=1$, show that $x^4+y^4\ge \frac{1}{8}$
Jan 12 '17 at 21:52
3
An interesting stopping time problem using PGF's
Feb 13 at 6:58
3
Rate of convegence of $\frac{E^2[X^n]}{ E[X^{n-1}] E[X^{n+1}]}$ as $n \to \infty$
Jun 26 '20 at 17:36
3
Maximum Entropy Distribution with Constraint
Aug 20 '19 at 14:28
3
Proving a reversed AM-HM inequality
Jul 30 '19 at 18:22
3
Inference regarding the mean lifetime of a bulb using a new technique
Apr 22 '19 at 2:50
3
Approximating $\sum_i \frac{a_i}{\lambda - \lambda_i} = \lambda$
Apr 15 '19 at 15:31
3
Is there a name for this formula/distribution: $f(i) = ( a / i^k ) b^i$?
Apr 2 '19 at 14:06
3
Clever Solutions: Find $\min_{a,b} E[(V -(aU+b))^2]$ without differentiation?
Feb 15 '19 at 18:27
3
How do I show this $xy\leq \frac{1}{p}x^p+\frac{1}{q}y^q.$ without using concavity of log function?
Dec 26 '18 at 22:47
2
Triangle inequality on t/(1+t)
Oct 25 '19 at 15:51
2
What is the derivative of an iterated product like $ \frac{d}{dx}\prod \limits_{i=0}^n \ln(y_i^{x - 1})$?
Mar 1 '19 at 3:20
2
How can I find the coefficient of $x^6$ in $(1+x+\frac{x^2}{2})^{10}$ efficiently with combinatorics?
Feb 12 '19 at 3:43
2
Finding rational polynomial functions that satisfy a certain equation to help solve wealthy gambler race problems
Jan 17 '19 at 18:05
2
Approximate value for $\sum_{i=1}^n 2^{\lceil \log_2i\rceil}$.
Jan 15 '19 at 19:12
2
If corr(A,B) = x and corr(B,C) = y, what is corr(A,C)?
Jun 9 '17 at 17:53
2
Integral inequality with non-increasing function and integral bound
Jan 7 '17 at 0:43
2
Uniformly random subset
Apr 7 '15 at 3:50
1
Covariance matrix of a random variable and its affine transformation
Feb 12 at 1:41
1
Finding Nth term using a generating function
Mar 3 at 8:31
1
Write $\int_1^e \frac{(\ln(\ln(x)))^3}{x}\,dx$ in terms of Gamma function.
Jan 28 at 15:20
1
2 3

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.