List questions from upper-lower-bounds

Published on 25 Mar 2026 - 19:04

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Exercise 6.4 in Stein's Complex Analysis

Published on 03 Apr 2026 - 5:21

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If $f(t)$ fulfill $\int_{-\infty}^\infty |f(t)|dt < \infty$, Is then true $\int_{-\infty}^\infty |f(t)|^2 dt < \infty$? If not, What else is needed?

Published on 30 Mar 2026 - 13:21

135

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Inequality on the unit cube $[0, 1]^d$

Published on 29 Mar 2026 - 23:58

28

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Maximization with a binding boundary constraint

Published on 17 Nov 2021 - 9:39

162

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Let $m\le k\le n$; when sampling an $m$-sized random subset from $\{1,2,\ldots,n\}$, how many will be from $\{1,2,\ldots,k\}$?

Published on 01 Apr 2026 - 20:30

40

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Bounded cumulative sums

Published on 17 Nov 2021 - 12:02

298

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Infinite Sum of Infinite Product

Published on 06 Apr 2026 - 0:17

369

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Are tail bounds on hypergeometric distribution weaker than Chernoff?

Published on 18 Nov 2021 - 13:14

109

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Prove or disprove a Hölder type bound on antiderivative

Published on 20 Nov 2021 - 10:41

291

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Supremum of an intersection of sets

Published on 22 Nov 2021 - 0:15

97

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Let $a_n>0$ be bounded and: $\limsup_{n\to\infty}\frac 1 {a_n}=\frac 1 {\liminf_{n\to\infty}a_n}$

Published on 22 Nov 2021 - 11:13

55

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How to modify the function $y=a-be^{-cx}$ so that it will look wavy? [ other forms can be suggested ]

Published on 02 Apr 2026 - 5:28

326

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Inequality with binomial coefficients $ \binom{2n-1}{n} + \binom{2n-1}{n+1} + \cdots + \binom{2n-1}{n+z} \geq (2z+3)\binom{2n-2}{n+z} $

Published on 24 Nov 2021 - 4:43

152

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Lower bound on the probability for a Binomial random variable to be greater than another

Published on 04 Apr 2026 - 6:59

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Bounding the spectral norm of a Gaussian random matrix

Exercise 6.4 in Stein's Complex Analysis

If $f(t)$ fulfill $\int_{-\infty}^\infty |f(t)|dt < \infty$, Is then true $\int_{-\infty}^\infty |f(t)|^2 dt < \infty$? If not, What else is needed?

Inequality on the unit cube $[0, 1]^d$

Maximization with a binding boundary constraint

Let $m\le k\le n$; when sampling an $m$-sized random subset from $\{1,2,\ldots,n\}$, how many will be from $\{1,2,\ldots,k\}$?

Bounded cumulative sums

Infinite Sum of Infinite Product

Are tail bounds on hypergeometric distribution weaker than Chernoff?

Prove or disprove a Hölder type bound on antiderivative

Supremum of an intersection of sets

Let $a_n>0$ be bounded and: $\limsup_{n\to\infty}\frac 1 {a_n}=\frac 1 {\liminf_{n\to\infty}a_n}$

How to modify the function $y=a-be^{-cx}$ so that it will look wavy? [ other forms can be suggested ]

Inequality with binomial coefficients $ \binom{2n-1}{n} + \binom{2n-1}{n+1} + \cdots + \binom{2n-1}{n+z} \geq (2z+3)\binom{2n-2}{n+z} $

Lower bound on the probability for a Binomial random variable to be greater than another

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