Hans-Peter Stricker's user avatar
Hans-Peter Stricker's user avatar
Hans-Peter Stricker's user avatar
Hans-Peter Stricker
  • Member for 12 years
  • Last seen this week
  • Germany
598 votes
40 answers
52k views

Examples of patterns that eventually fail

  • 2,263
581 votes
21 answers
91k views

Mathematical difference between white and black notes in a piano

  • 5,697
283 votes
27 answers
22k views

Why do mathematicians use single-letter variables?

  • 2,963
147 votes
7 answers
4k views

Studying Euclidean geometry using hyperbolic criteria

  • 4,823
142 votes
4 answers
8k views

Does $R[x] \cong S[x]$ imply $R \cong S$?

  • 3,715
124 votes
3 answers
46k views

How to find the Galois group of a polynomial?

  • 3,785
120 votes
3 answers
2k views

All real numbers in $[0,2]$ can be represented as $\sqrt{2 \pm \sqrt{2 \pm \sqrt{2 \pm \dots}}}$

  • 30.4k
101 votes
13 answers
11k views

Why would I want to multiply two polynomials?

  • 1,019
91 votes
2 answers
3k views

Do most numbers have exactly $3$ prime factors?

89 votes
3 answers
9k views

What is "ultrafinitism" and why do people believe it?

  • 9,525
88 votes
4 answers
36k views

Why is $e^{\pi \sqrt{163}}$ almost an integer?

  • 2,476
83 votes
6 answers
55k views

Is $\mathbf{Q}(\sqrt{2}, \sqrt{3}) = \mathbf{Q}(\sqrt{2}+\sqrt{3})$?

  • 1,523
60 votes
12 answers
41k views

Is there an equation to describe regular polygons?

60 votes
9 answers
8k views

Intuition behind "ideal"

  • 5,124
58 votes
5 answers
36k views

Every nonzero element in a finite ring is either a unit or a zero divisor

  • 663
54 votes
6 answers
9k views

Proving that $\left(\mathbb Q[\sqrt p_1,\dots,\sqrt p_n]:\mathbb Q\right)=2^n$ for distinct primes $p_i$.

53 votes
5 answers
11k views

Category of all categories vs. Set of all sets

  • 17.2k
50 votes
7 answers
22k views

Mind maps of Advanced Mathematics and various branches thereof

  • 1,011
49 votes
5 answers
10k views

Why is it so hard to find the roots of polynomial equations?

  • 918
42 votes
3 answers
10k views

Inner Product Spaces over Finite Fields

  • 3,141
40 votes
2 answers
4k views

Is every group a Galois group?

  • 9,836
37 votes
5 answers
5k views

Did Euclid prove that $\pi$ is constant?

35 votes
4 answers
63k views

Compass-and-straightedge construction of the square root of a given line?

  • 13.9k
34 votes
4 answers
23k views

Modus Operandi. Formulae for Maximum and Minimum of two numbers with a + b and $|a - b|$

  • 4,153
34 votes
3 answers
8k views

Is Category Theory similar to Graph Theory?

  • 1,101
34 votes
11 answers
15k views

How to prove $\cos \frac{2\pi }{5}=\frac{-1+\sqrt{5}}{4}$?

30 votes
2 answers
60k views

Finding path-lengths by the power of Adjacency matrix of an undirected graph

  • 403
29 votes
1 answer
480 views

A spiralling sequence based on integer divisors. Has anyone noticed this before?

  • 503
28 votes
2 answers
1k views

How to create mazes on the hyperbolic plane?

28 votes
3 answers
2k views

Is the rectangular function a convolution of $L^1$ functions?

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