User Nautilus

20 votes

2 answers

1k views

Open subsets of Euclidean space in dimension 5 and higher admitting exotic smooth structures

asked Sep 20, 2017 at 18:41

10 votes

2 answers

2k views

A result attributed to Whitney

asked Feb 10, 2015 at 14:31

9 votes

0 answers

365 views

Filmed lectures by Hassler Whitney

asked Mar 2, 2015 at 13:39

9 votes

1 answer

2k views

Density of smooth functions on Hölder spaces

asked Jul 15, 2016 at 10:34

8 votes

2 answers

376 views

Best provable and unconditional lower and upper bounds for Brun's constant

asked Jul 26, 2017 at 11:14

2 votes

0 answers

305 views

Piecewise smooth boundary version of Schoenflies Theorem

asked Feb 9, 2015 at 8:44

1 vote

1 answer

145 views

How to recognize if a continuous vector field in the Euclidean space is a gradient

asked Dec 20, 2018 at 19:06

1 vote

0 answers

200 views

Filmed lectures by Jürgen Moser

asked Feb 10, 2015 at 15:03

0 votes

0 answers

95 views

C^r extension of a function defined on a bounded connected open set

asked Oct 26, 2016 at 12:16

0 votes

0 answers

122 views

Explicit upper bounds on the number of primes up to the square of the $n^\text{th}$ prime number $p_n$

asked Jul 31 at 11:36

Stack Exchange Network

10 Questions

Open subsets of Euclidean space in dimension 5 and higher admitting exotic smooth structures

A result attributed to Whitney

Filmed lectures by Hassler Whitney

Density of smooth functions on Hölder spaces

Best provable and unconditional lower and upper bounds for Brun's constant

Piecewise smooth boundary version of Schoenflies Theorem

How to recognize if a continuous vector field in the Euclidean space is a gradient

Filmed lectures by Jürgen Moser

C^r extension of a function defined on a bounded connected open set

Explicit upper bounds on the number of primes up to the square of the $n^\text{th}$ prime number $p_n$