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Neal
  • Member for 10 years, 9 months
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40 votes
1 answer
2k views

Why are functions with vanishing normal derivative dense in smooth functions?

18 votes
1 answer
932 views

Twisted Cech cohomology

15 votes
2 answers
944 views

Can a dynamic programming problem be transformed into a linear algebra problem?

13 votes
2 answers
1k views

Does proving (second countable) $\Rightarrow$ (Lindelöf) require the axiom of choice?

10 votes
3 answers
2k views

Lie algebra action from Lie group action: coordinates

7 votes
1 answer
821 views

What is the orthogonal complement of $H^1_0$ in $H^1$?

5 votes
1 answer
170 views

Does the form domain of the Friedrichs extension of an unbounded operator compactly embed?

5 votes
0 answers
457 views

Non-closed subgroups of Lie groups

4 votes
0 answers
348 views

Useful topology on space of smooth structures on $\mathbb R^4$?

4 votes
2 answers
575 views

Is there a systematic way to detect overcounting in simple combinatorics?

3 votes
2 answers
411 views

When does L'Hopital's rule pick up asymptotics?

3 votes
1 answer
432 views

How to relate the spectrum of a self-adjoint unbounded operator to the spectrum of a compact solution operator

3 votes
1 answer
63 views

Why does the limit of this sum of powers of logarithms equal the Gamma function?

2 votes
0 answers
217 views

What is the Fourier series of $e^{\mu\cos\theta}$?

0 votes
2 answers
130 views

What is the probability of finding a number of the form $\frac{n}{n+1}$ in $\Bbb{Q}\cap [0,1]$?