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Hans
  • Member for 9 years, 3 months
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16 votes
3 answers
611 views

Convexity of $x\left(1+\frac1x\right)^x,\ x\ge 0$

12 votes
5 answers
3k views

Minimize $\min_{f\in E}\left(\int_0^1f(x) dx\right)$

11 votes
3 answers
729 views

Local maximum uniqueness of the logarithm of the Student-t distribution

10 votes
1 answer
300 views

permutation search game

9 votes
1 answer
6k views

Expectation of Exponential of Stochastic Integral

9 votes
3 answers
498 views

Compute $\int_{0}^{\infty} \frac{\sqrt{x}\sin(x)}{1+x^2} dx$

8 votes
1 answer
185 views

range of a fractional function

8 votes
3 answers
8k views

Example of continuous but not absolutely continuous strictly increasing function

7 votes
1 answer
2k views

Convergence to the Dirac Delta Function

7 votes
3 answers
256 views

functional equation $f(x^2)=xf(x)$

6 votes
5 answers
172 views

Prove $\sqrt{a^2+4}+\sqrt{b^2+4}\leq\frac{\sqrt{2}}{4}(a+b)^2$ with $\frac1a+\frac1b=1$.

6 votes
2 answers
293 views

Prove $\sum_{\text{cyc}}^{}\sqrt[3] {1+2ac} \le 3\sqrt [3] {3}$.

6 votes
1 answer
203 views

Seeking a More Elegant Proof to an Expectation Inequality

6 votes
3 answers
201 views

No Adjacency Combinatorics Problem via Generating Function

6 votes
3 answers
331 views

Nonuniqueness of Stochastic Differential Equation

6 votes
1 answer
798 views

Hermite polynomials approximate of a function and its derivatives

6 votes
2 answers
673 views

The asymptotic expansion of an integral of an exponential function

5 votes
1 answer
151 views

Guessing the number of other $1$'s in a binary sequence

5 votes
2 answers
306 views

Quadratic surd continued fraction convergent ratio limit

5 votes
2 answers
172 views

An integral inequality for variance

5 votes
0 answers
66 views

Arranging Points Uniformly on the Unit Sphere

5 votes
2 answers
958 views

Why Is Inverse of a Polynomial Still a Polynomial?

5 votes
0 answers
1k views

sum of digits in different bases

4 votes
2 answers
276 views

Is Fibonacci sequence the minimum of unique pairwise sum sequence?

4 votes
3 answers
452 views

A convolution like integral equation

4 votes
1 answer
186 views

optimal sorting

4 votes
1 answer
277 views

Derivation of the Fourier Sine Transform of a Rational Function

4 votes
1 answer
286 views

A functional equation of a matrix

4 votes
0 answers
129 views

Partial differential equation with a nowhere differentiable boundary

3 votes
0 answers
303 views

Interchanging Integration Order involving Fourier Transform

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