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sma
  • Member for 6 years, 2 months
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189 votes
9 answers
15k views

"Advice to young mathematicians"

  • 7,716
121 votes
6 answers
61k views

lim sup and lim inf of sequence of sets.

54 votes
2 answers
29k views

Why is $L^{\infty}$ not separable?

  • 1,563
42 votes
4 answers
9k views

Free throw interview question

  • 600
29 votes
3 answers
11k views

How does the quotient $\mathbb{R}/\mathbb{Z}$ become the circle $S^1$?

  • 316
23 votes
3 answers
16k views

What does "test function" mean?

  • 2,240
14 votes
2 answers
2k views

Simple proof that Fourier transform is an isomorphism between $L^p$ spaces for $p \neq 2$?

  • 3,392
11 votes
1 answer
14k views

How to set up Lagrangian optimization with matrix constrains

  • 5,451
7 votes
2 answers
2k views

When can we use derivative test to identify injective function?

5 votes
1 answer
231 views

Puzzle on the proof of that test function space is not metrizable

  • 895
4 votes
1 answer
734 views

Deriving Bayesian logistic regression

  • 48.6k
3 votes
2 answers
2k views

Uniqueness of the Jordan decomposition

3 votes
1 answer
630 views

$L^p(\mathbb{R})$ separable.

2 votes
1 answer
565 views

Analytic function given by improper integral

  • 9,042
1 vote
2 answers
338 views

Find the jordan basis for $A$

  • 6,415
1 vote
1 answer
346 views

Can essentially bounded function take infinite value on measure zero set?

  • 11
1 vote
2 answers
7k views

How to find residue of a function

  • 183