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mlg4080
  • Member for 10 years, 8 months
  • Last seen more than a month ago
17 votes
2 answers
2k views

$f : \mathbb{R} \to \mathbb{R}$ (Lipschitz) continuous implies $f(A)$ is Borel for all Borel $A$.

13 votes
5 answers
1k views

What went wrong? [One-dimensional-inverse-square-law]

11 votes
1 answer
6k views

If $f \in L^{\infty}$ and $\exists r < \infty$ so that $\|f\|_r < \infty$, show $\lim_{p \rightarrow \infty} \|f\|_p = \|f\|_{\infty}$ [duplicate]

8 votes
2 answers
167 views

Under what conditions on $f$ does $\|f\|_r = \|f\|_s$ for $0 < r < s < \infty$.

6 votes
0 answers
2k views

Prove there is no branch of arg $z$ on $0 < z < 1$.

5 votes
1 answer
275 views

Etymology of 'finite place'

3 votes
1 answer
725 views

Zagier's proof of the prime number theorem.

3 votes
1 answer
864 views

Converse to the Hausdorff-Young inequality

2 votes
2 answers
413 views

A non-trivial, non-negative, function bounded below by its derivative with $f(0)=0$?

2 votes
0 answers
29 views

Maximal angle distortion by positive definite matrix

2 votes
2 answers
306 views

Example of a compact non-$G_{\delta}$ set?

1 vote
0 answers
429 views

Convolution of a distribution with a $C^{N}$ function.

1 vote
1 answer
226 views

The $L^{2}$-difference of a Lipschitz function and its mollified function.

1 vote
2 answers
312 views

Local Approximation $W^{1,p}$ functions by smooth functions.

0 votes
1 answer
194 views

Choosing contour to evaluate integral