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Damian Reding
  • Member for 7 years, 6 months
  • Last seen this week
  • Rotterdam, Netherlands
126 votes
19 answers
6k views

Past open problems with sudden and easy-to-understand solutions

66 votes
6 answers
6k views

Proving the existence of a proof without actually giving a proof

44 votes
4 answers
4k views

What's between the finite and the infinite?

21 votes
5 answers
2k views

Is $11^2+12^2+13^2+14^2+15^2+16^2=1111$ special?

18 votes
2 answers
641 views

Wanted: A simple and didactically optimized integration theory

16 votes
3 answers
774 views

How, if at all, does pure mathematics benefit from $2^{74207281}-1$ being prime?

15 votes
3 answers
1k views

Evidence against Goldbach's Conjecture?

13 votes
2 answers
192 views

Is every natural number the truncation of a prime?

12 votes
3 answers
514 views

What's true in $\mathbb{R}^4$, false in $\mathbb{R}^3$ and uninteresting in $\mathbb{R}^5$?

9 votes
2 answers
962 views

Quartic as a product of quadratics

9 votes
1 answer
201 views

Flies in a cube

9 votes
1 answer
100 views

Relative consistency of slightly modified GCH

7 votes
3 answers
157 views

Mathematics hiding in plain sight

7 votes
1 answer
338 views

Monotonic "Subfunction"

7 votes
1 answer
149 views

Approximating $x^m$ by exponentials

7 votes
1 answer
152 views

Cardinality of order topology?

6 votes
2 answers
370 views

Degree of minimal polynomial of the sum of two algebraic elements over $\mathbb Q$

6 votes
0 answers
107 views

One more AC equivalence question

6 votes
1 answer
116 views

Is there a simple formula for the cardinality of $\{A\subseteq\kappa\mid |A|\leq\lambda\}$ when $\lambda\leq\kappa$?

6 votes
4 answers
739 views

Instance of Mean Value Theorem

6 votes
4 answers
1k views

What should "The Fundamental Theorem of Linear Algebra" assert? [closed]

5 votes
0 answers
109 views

Subfields of algebraic numbers

5 votes
0 answers
257 views

Bishop-Phelps theorem

5 votes
3 answers
180 views

Examples of exotic (non-)norms?

5 votes
1 answer
96 views

Do we need finite intersections of open sets to be open?

4 votes
0 answers
75 views

Codimensions of $\mathbb{Q}$-subspaces of $\mathbb{R}$

4 votes
1 answer
130 views

Unmasking the completeness of $\mathbb{R}$

4 votes
2 answers
80 views

Convergence Problem in Normed Space

4 votes
2 answers
120 views

Differentiation always easy?

4 votes
0 answers
93 views

Extremal problem with infinite cardinals

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