User Tom Chen

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5

votes

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286

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

Sep 12 '19 at 16:03 Ian 84.9k

1

3

votes

0

answers

78

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

131

views

Vandermonde-type convolution with geometric term

combinatorics binomial-coefficients generating-functions

Nov 29 '16 at 21:20 emiliocba 848

2

votes

2

answers

67

views

An interesting stopping time problem using PGF's

probability number-theory generating-functions stopping-times

Feb 15 at 23:14 RobPratt 23.6k

2

votes

0

answers

41

views

Sums of Cauchy distributions and their conditional distribution

probability density-function characteristic-functions

May 1 '20 at 5:32 Tom Chen 3,170

2

votes

1

answer

121

views

Maximizing a permutation of a quadratic form

inequality optimization quadratic-forms integer-programming rearrangement-inequality

Aug 15 '19 at 19:46 Sandeep Silwal 7,685

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 17.6k

2

votes

0

answers

51

views

Higher moments of linear regression residuals?

linear-algebra statistics tensor-products projection-matrices

Jan 28 '19 at 17:14 Tom Chen 3,170

2

votes

0

answers

117

views

Supremum of a general Gaussian Process

stochastic-processes stochastic-calculus brownian-motion

Nov 12 '18 at 2:32 Tom Chen 3,170

2

votes

1

answer

137

views

Woodbury's formula with block-diagonal matrix

linear-algebra matrices inverse

Nov 4 '18 at 7:28 JimmyK4542 49k

2

votes

0

answers

129

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 295

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vote

0

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25

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Another matrix property question: eigenvalues of a matrix

matrices eigenvalues-eigenvectors approximation

Sep 8 at 3:36 Tom Chen 3,170

1

vote

0

answers

34

views

Inequality between linear combinations of rank-one matrices?

inequality permutations matrix-decomposition majorization

Aug 27 at 3:12 Tom Chen 3,170

1

vote

1

answer

49

views

Maximum value of a parameter in a cyclic inequality?

inequality rearrangement-inequality

Aug 5 at 1:50 Tom Chen 3,170

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vote

1

answer

21

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A type of sequence inversion?

sequences-and-series inverse lagrange-inversion

Mar 30 '20 at 23:25 Leucippus 22.3k

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vote

1

answer

2k

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Conditional distribution of subvector of a Dirichlet random variable

probability-distributions

Feb 5 '20 at 18:32 StubbornAtom 13.1k

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vote

0

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31

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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 3,170

1

vote

0

answers

46

views

Maximum likelihood of a non-injective transformation

probability optimization numerical-optimization maximum-likelihood

Apr 24 '17 at 15:19 Tom Chen 3,170

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 3,170

1

vote

0

answers

155

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 3,170

1

vote

1

answer

184

views

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

probability statistics optimization hypothesis-testing

Oct 29 '16 at 20:13 BruceET 45.9k

1

vote

1

answer

100

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A binomial symmetric sum

probability expectation binomial-distribution symmetric-polynomials

Apr 5 '16 at 12:33 Tom Chen 3,170

1

vote

1

answer

97

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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

21

views

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

probability-theory convolution uniform-distribution

Feb 1 at 4:43 Carmeister 3,433

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votes

0

answers

18

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

probability integration

May 2 '20 at 20:17 Tom Chen 3,170

0

votes

0

answers

20

views

Multivariate normal conditional distribution with box constraints

random-variables normal-distribution conditional-expectation

Apr 30 '20 at 19:25 Tom Chen 3,170

0

votes

1

answer

72

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

63

views

Optimization of sum of squares over permutations

optimization permutations sums-of-squares rearrangement-inequality

Aug 8 '18 at 16:21 Tom Chen 3,170

0

votes

1

answer

113

views

A binomial sum identity

probability combinatorics summation binomial-coefficients

Jul 24 '16 at 15:33 Martin Sleziak 52.2k

0

votes

0

answers

54

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 3,170

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30 Questions

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

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

Vandermonde-type convolution with geometric term

An interesting stopping time problem using PGF's

Sums of Cauchy distributions and their conditional distribution

Maximizing a permutation of a quadratic form

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

Higher moments of linear regression residuals?

Supremum of a general Gaussian Process

Woodbury's formula with block-diagonal matrix

Probability that Brownian motion falls between two piecewise constant functions

Another matrix property question: eigenvalues of a matrix

Inequality between linear combinations of rank-one matrices?

Maximum value of a parameter in a cyclic inequality?

A type of sequence inversion?

Conditional distribution of subvector of a Dirichlet random variable

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

Maximum likelihood of a non-injective transformation

Approximating (or better yet, solving) a functional equation

Inversion of so-called probability-generating functional

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

A binomial symmetric sum

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

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

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

Multivariate normal conditional distribution with box constraints

Further terms of Taylor expansion for improved inequalities?

Optimization of sum of squares over permutations

A binomial sum identity

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