Gerald Edgar's user avatar
Gerald Edgar's user avatar
Gerald Edgar's user avatar
Gerald Edgar
  • Member for 14 years, 5 months
  • Last seen this week
1 vote

Is $\int_{\mathbb{R}} \int_{\mathbb{R}^n} \alpha w(t) e(\alpha (a_1t_1 + \dotsb + a_n t_n)) dt\,d \alpha = 0$?

5 votes

When is the Minkowski sum of weighted compact sets $w_1 B_1 + w_2 B_2 + \ldots$ (with $w \in L^1$) closed?

3 votes

Analytic approximation of the step function in $L^p$ norm

4 votes
Accepted

Reference request: Rigorously solving ODEs using divergent asymptotic series

3 votes

A solution to the differential equation $Y'' + M(x^2 Y)' - x^2 Y = 0$

3 votes
Accepted

What is the difference $\{\tau\leq t\}\in (\mathcal{F})_t $ and $\{\tau<t\}\in (\mathcal{F})_t $ in the definition of stopping time?

1 vote

How to show something is "true in mean square"?

15 votes

Can every real function be approximated with a Riemann-integrable one with any precision required?

5 votes

What is a good formalization of this classic math puzzle?

4 votes

Extended binomial coefficients and the gamma function

4 votes
Accepted

Imaginary only values of the Lambert W function

11 votes

Mathematical journals that accept long papers (up to 100 pages)

2 votes

Need list of top journals with shortest review time

2 votes

When is $(a_jb_j)_j \subset L^2[0,1]$ complete in $L^2[0,1]$ provided that both $(a_j)_j$ and $(b_j)_j$ are complete?

7 votes
Accepted

A Baire subset of reals that is not Suslin measurable

9 votes

How the solve the equation $\frac{(a+b\ln(x))^2}{x}=c$

22 votes

Functions of $\mathbb{R}^d$ preserving convexity of sets

4 votes
Accepted

Natural boundary with non-zero "thickness"

1 vote

What's meant by this measure in the sample space of a probability distribution?

3 votes

Math contest questions that involve non-Euclidean problems?

3 votes
Accepted

Is the ball ratio theorem for Radon–Nikodým derivative known for general metric spaces?

6 votes
Accepted

$\sum_{k=0}^{\infty} {\frac{(-1)^{k} \Gamma(\frac{2k+n+m}{2})\,\Gamma(\frac{2k+m-1}{2})}{k!\Gamma(k+\frac{m}{2})}} z^{2k}$ is an elementary function

27 votes

What about a mathematics journal for 'negative' results?

5 votes

Solution to $\int_{0}^{y} x^{-a} \exp \left[- \frac{(b - cx^{-d})^2}{2} \right] dx$

7 votes
Accepted

Hausdorff measure

4 votes

Can we say that everywhere where it makes sense $\log_0 x=0^x$? Are they equal, the function is self-inverse? If so, what is deep intuition behind it?

10 votes

Taking a theorem as a definition and proving the original definition as a theorem

3 votes

Is there a decision procedure for analytic continuation?

2 votes
Accepted

How to find $\int_{0}^{\infty} \log(1+x)(x^a)\exp(-bx) dx$ step by step?

6 votes
Accepted

On the operator $f\to xf'/f$

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