Tito Eliatron's user avatar
Tito Eliatron's user avatar
Tito Eliatron's user avatar
Tito Eliatron
  • Member for 10 years, 8 months
  • Last seen more than a week ago
5 votes
3 answers
191 views

Is there a change of variables that allows one to calculate $\int_0^\pi \frac{1}{4-3\cos^2 x}\, \mathrm dx$ avoiding improperties?

4 votes
0 answers
75 views

Riemann-Stieljes integration and Total variation

4 votes
0 answers
196 views

Maps in $\mathbb{R}^n$ preserving harmonic functions

3 votes
3 answers
655 views

Sequences of integers with lower density 0 and upper density 1.

3 votes
1 answer
259 views

Powers-of-10-multiples of $\pi$ (or any irrational) are dense

3 votes
1 answer
168 views

Dimension of the graph of a product of continuous functions

3 votes
2 answers
148 views

A $5\times 5$ square with $+1$ and $-1$

2 votes
1 answer
59 views

Convergence of $\int_0^1\frac{f(x)}{x}dx$. [duplicate]

2 votes
0 answers
34 views

Intersection of infinitely many $L^p$ spaces over $\mathbb{R}$: reference-request

2 votes
1 answer
313 views

Show that $\frac{3}{8}\le\int_0^{1/2}\sqrt{\frac{1-x}{1+x}}dx\le \frac{\sqrt{3}}{4}$

1 vote
1 answer
105 views

Sets of null (Lebesgue)-measure and sigma compacts

1 vote
1 answer
90 views

Reference on separability of $c_0(X)$, where $X$ is a separable Banch space

1 vote
1 answer
151 views

Box dimension, graphs and sum of functions

0 votes
1 answer
59 views

Convergence/Divergence of $\sum \frac{-a_n}{\log a_n}$

0 votes
0 answers
62 views

Fake proof: 2=4 using nested exponents [duplicate]

0 votes
0 answers
49 views

Measurable function such that $f(af(x))$ is not measurable for any $a\ne0$