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Tom Chen

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30 Questions

Votes Activity Newest Views
1
5
votes
1
answer
252
views

A ridiculously fast way to find fixed points of the logistic function?

numerical-methods lambert-w fixed-points
Sep 12 '19 at 16:03 Ian 83.9k
1
3
votes
0
answers
76
views

Redux: An interesting four sum inequality (feat. probability)

probability inequality contest-math supremum-and-infimum
Aug 13 '19 at 16:43 Community♦ 1
1
3
votes
1
answer
126
views

Vandermonde-type convolution with geometric term

combinatorics binomial-coefficients generating-functions
Nov 29 '16 at 21:20 emiliocba 848
 
2
votes
2
answers
61
views

An interesting stopping time problem using PGF's

probability number-theory generating-functions stopping-times
Feb 15 at 23:14 RobPratt 21.6k
 
2
votes
0
answers
38
views

Sums of Cauchy distributions and their conditional distribution

probability density-function characteristic-functions
May 1 at 5:32 Tom Chen 3,150
 
2
votes
1
answer
113
views

Maximizing a permutation of a quadratic form

inequality optimization quadratic-forms integer-programming rearrangement-inequality
Aug 15 '19 at 19:46 Sandeep Silwal 7,655
 
2
votes
0
answers
65
views

A “divide-and-conquer” iterative procedure for minimizing a sum of convex functions

optimization convex-optimization numerical-optimization newton-raphson
May 19 '19 at 6:51 Rodrigo de Azevedo 17k
 
2
votes
0
answers
48
views

Higher moments of linear regression residuals?

linear-algebra statistics tensor-products projection-matrices
Jan 28 '19 at 17:14 Tom Chen 3,150
 
2
votes
0
answers
115
views

Supremum of a general Gaussian Process

stochastic-processes stochastic-calculus brownian-motion
Nov 12 '18 at 2:32 Tom Chen 3,150
 
2
votes
1
answer
131
views

Woodbury's formula with block-diagonal matrix

linear-algebra matrices inverse
Nov 4 '18 at 7:28 JimmyK4542 48.5k
 
2
votes
0
answers
127
views

Probability that Brownian motion falls between two piecewise constant functions

probability stochastic-processes brownian-motion confidence-interval
Jul 7 '16 at 20:34 user345872 255
 
1
vote
0
answers
22
views

Another matrix property question: eigenvalues of a matrix

matrices eigenvalues-eigenvectors approximation
Sep 8 at 3:36 Tom Chen 3,150
 
1
vote
0
answers
31
views

Inequality between linear combinations of rank-one matrices?

inequality permutations matrix-decomposition majorization
Aug 27 at 3:12 Tom Chen 3,150
 
1
vote
1
answer
48
views

Maximum value of a parameter in a cyclic inequality?

inequality rearrangement-inequality
Aug 5 at 1:50 Tom Chen 3,150
 
1
vote
1
answer
21
views

A type of sequence inversion?

sequences-and-series inverse lagrange-inversion
Mar 30 '20 at 23:25 Leucippus 22.2k
1
1
vote
1
answer
2k
views

Conditional distribution of subvector of a Dirichlet random variable

probability-distributions
Feb 5 '20 at 18:32 StubbornAtom 12.8k
 
1
vote
0
answers
30
views

Distribution of outer product of two uniform r.v.'s on ellipsoid

probability normal-distribution outer-product
Jan 25 '18 at 4:30 Tom Chen 3,150
 
1
vote
0
answers
45
views

Maximum likelihood of a non-injective transformation

probability optimization numerical-optimization maximum-likelihood
Apr 24 '17 at 15:19 Tom Chen 3,150
1
1
vote
0
answers
35
views

Approximating (or better yet, solving) a functional equation

functional-equations regression interpolation approximation-theory
Feb 16 '17 at 3:13 Tom Chen 3,150
 
1
vote
0
answers
143
views

Inversion of so-called probability-generating functional

probability sequences-and-series power-series poisson-process lagrange-inversion
Feb 14 '17 at 9:16 Tom Chen 3,150
 
1
vote
1
answer
180
views

Maximizing the p-value associated with a goodness-of-fit test

probability statistics optimization hypothesis-testing
Oct 29 '16 at 20:13 BruceET 44.9k
 
1
vote
1
answer
98
views

A binomial symmetric sum

probability expectation binomial-distribution symmetric-polynomials
Apr 5 '16 at 12:33 Tom Chen 3,150
 
1
vote
1
answer
96
views

Proving $(n+1)c^{1/(n+1)} - nc^{1/n} \le 1$ from first principles

sequences-and-series inequality
May 20 '15 at 3:08 Community♦ 1
 
0
votes
1
answer
18
views

Can the sum of two non-degenerative random variables ever be uniform?

probability-theory convolution uniform-distribution
Feb 1 at 4:43 Carmeister 3,413
 
0
votes
0
answers
16
views

What is this integral? Sums of Cauchy, crossed between two random variables

probability integration
May 2 at 20:17 Tom Chen 3,150
 
0
votes
0
answers
19
views

Multivariate normal conditional distribution with box constraints

random-variables normal-distribution conditional-expectation
Apr 30 at 19:25 Tom Chen 3,150
 
0
votes
1
answer
71
views

Further terms of Taylor expansion for improved inequalities?

algebra-precalculus inequality recreational-mathematics a.m.-g.m.-inequality
Dec 25 '18 at 8:50 Community♦ 1
 
0
votes
0
answers
60
views

Optimization of sum of squares over permutations

optimization permutations sums-of-squares rearrangement-inequality
Aug 8 '18 at 16:21 Tom Chen 3,150
 
0
votes
1
answer
111
views

A binomial sum identity

probability combinatorics summation binomial-coefficients
Jul 24 '16 at 15:33 Martin Sleziak 51.9k
 
0
votes
0
answers
53
views

Solving for $f_2(x, y)$ in $\int_{\mathbb{R}}f_1(x, y) f_2(x, y) dx = g(y)$

probability integration inverse functional-equations
Jul 14 '16 at 3:14 Tom Chen 3,150
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