User David Moews - Mathematics Stack Exchange

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	10,183 reputation	bio	website		visits	member for	1 year, 5 months
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30

80

votes

2

answers

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Can we ascertain that there exists an epimorphism $G\rightarrow H$?

may 4 at 1:53 user32240 4,946

12

23

votes

0

answers

840

views

$4494410$ and friends

algebra-precalculus elementary-number-theory arithmetic recreational-mathematics

may 10 at 23:04 Community♦ 1

5

22

votes

3

answers

319

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Picture of a 4D knot

geometry knot-theory

mar 2 at 7:46 Rahul Narain 17k

9

22

votes

2

answers

454

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How to prove that $\frac{(5m)!(5n)!}{(m!)(n!)(3m+n)!(3n+m)!}$ is a natural number?

homework elementary-number-theory

apr 30 at 7:56 Mark Hurd 372

3

12

votes

2

answers

226

views

Can an uncountable family of positive-measure sets be such that each point belongs to only finitely many of them?

measure-theory

mar 22 at 10:28 Cian Dorr 246

1

9

votes

0

answers

190

views

Does it exist a function for which the derivative changes sign more than countably many times?

calculus

apr 20 at 14:11 user73503 1

5

9

votes

0

answers

136

views

Must the Minkowski sum of a Borel set and a closed ball be Borel?

measure-theory

feb 9 at 7:56 Bjørn Kjos-Hanssen 101

4

8

votes

2

answers

112

views

Dimension of an algebraic closure as a vector space over its base field.

field-theory

mar 14 at 10:07 Georges Elencwajg 45k

6

8

votes

1

answer

147

views

Prove that $\sum_{k=0}^n{e^{ik^2}} = o(n^\alpha)$, $ \forall \alpha >0$

real-analysis summation

mar 27 at 2:18 Douglas B. Staple 1,026

4

7

votes

1

answer

145

views

Decomposition of $C_0^{\infty}(\mathbb{R}^n)$ -function

real-analysis fourier-analysis

feb 21 at 11:02 Davide Giraudo 56.3k

4

6

votes

3

answers

225

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Show $\sum_{n=1}^{\infty}\frac{\sinh\pi}{\cosh(2n\pi)-\cosh\pi}=\frac1{\text{e}^{\pi}-1}$ and another

calculus real-analysis sequences-and-series hyperbolic-functions

feb 23 at 19:31 L. F. 3,611

5

6

votes

1

answer

119

views

Relation between function discontinuities and Fourier transform at infinity

calculus fourier-analysis

mar 3 at 1:03 Community♦ 1

2

6

votes

1

answer

124

views

Finding near-integers in a range

analytic-number-theory continued-fractions diophantine-approximation

apr 27 at 13:54 mercio 11.3k

2

4

votes

2

answers

173

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Integrate $\int_{0}^{1}{x^{-x}(1-x)^{x-1}\sin{\pi x}dx}$

calculus

apr 2 at 21:44 Zander 4,572

3

4

votes

1

answer

114

views

Asymptotic Expansion

asymptotics

mar 30 at 20:49 Raymond Manzoni 15.4k

2

4

votes

0

answers

44

views

Asymptotic behavior of $|f'(x)|^n e^{-f(x)}$

real-analysis asymptotics

feb 8 at 16:50 julien 23k

2

4

votes

1

answer

51

views

Approximate continuous mapping by smooth mappings on manifold(Bott, Tu book)

general-topology analysis differential-topology

feb 9 at 20:09 Potato 8,732

1

3

votes

1

answer

71

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Robertson-Seymour fails for topological minor ordering? (I.e., subgraphs and subdivision)

reference-request graph-theory order-theory

feb 12 at 21:17 Alexander Gruber♦ 15.2k

1

3

votes

2

answers

83

views

Every uncountable Polish Space has a copy of $\{0, 1\}^\mathbb{N}$

real-analysis measure-theory probability-theory descriptive-set-theory

mar 3 at 12:52 Arthur Fischer♦ 21.3k

1

2

votes

0

answers

96

views

Extending a probability measure to a finer $\sigma$-algebra

measure-theory probability-theory

mar 4 at 2:45 Meeuw 11

1

2

votes

0

answers

60

views

Prove that you can't connect both pairs of opposite sides of a square without the two paths intersected.

general-topology

mar 3 at 0:28 Voldemort 1,359

1

2

votes

2

answers

75

views

Is Turing-completeness decidable?

computability

may 1 at 1:15 Ben Standeven 46

3

1

vote

0

answers

50

views

inequality for series

real-analysis sequences-and-series inequality power-series functional-inequalities

mar 4 at 4:19 Alex 86

1

0

votes

1

answer

64

views

A question on probability measures on uncountable spaces

homework measure-theory probability-theory

dec 14 at 8:18 Isomorphism 1,494

1

0

votes

0

answers

125

views

The Mysterious Kalva (Looking for data on John Scholes and kalva.demon.co.uk)

soft-question contest-math

jan 30 at 1:28 vonbrand 6,616

1

0

votes

0

answers

62

views

Tournament of the cakes

algorithms

mar 8 at 19:44 xan 447

1

-1

votes

1

answer

67

views

Expectation probability question

probability

feb 10 at 17:57 vonbrand 6,616

David Moews

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