Gro-Tsen's user avatar
Gro-Tsen's user avatar
Gro-Tsen's user avatar
Gro-Tsen
  • Member for 12 years, 7 months
  • Last seen this week
93 votes
5 answers
12k views

Note rejected from arXiv: what to do next?

65 votes
21 answers
9k views

Situations where “naturally occurring” mathematical objects behave very differently from “typical” ones

57 votes
1 answer
5k views

Every real function has a dense set on which its restriction is continuous

42 votes
1 answer
2k views

Do the analogies between metamathematics of set theory and arithmetic have some deeper meaning?

37 votes
1 answer
2k views

When do 27 lines lie on a cubic surface?

29 votes
2 answers
3k views

Does Taranovsky's system of ordinal notations make sense?

27 votes
1 answer
1k views

Solving a delay-differential equation related to epidemiology

26 votes
2 answers
3k views

What is the origin/history of the following very short definition of the Lebesgue integral?

26 votes
1 answer
798 views

What are the points of simple algebraic groups over extensions of $\mathbb{F}_1$?

24 votes
1 answer
2k views

In what ways is ZF (without Choice) "somewhat constructive"

24 votes
3 answers
2k views

Real Lie groups versus real linear algebraic groups: differences in connexity and fundamental group

22 votes
1 answer
2k views

What is known about the common knowledge of mathematicians outside their field?

21 votes
2 answers
459 views

Labeling binary trees so that adjacent vertices differ by a power of two

21 votes
1 answer
464 views

What is known about the consistency of $2^{\aleph_\alpha} = \aleph_{\alpha+\gamma}$ for all $\alpha$?

20 votes
1 answer
1k views

Axiom of Choice versus V=L in opposition to large cardinals

18 votes
1 answer
624 views

Known configurations maximizing the volume of the convex hull of n points on the unit sphere

18 votes
1 answer
356 views

Proof as a Σ₁ approximation to truth: what about higher degrees?

18 votes
1 answer
1k views

Looking for a copy of Leo Harrington's unpublished notes on the first nonprojectible ordinal

18 votes
0 answers
2k views

Distribution of digits of $pq$-adic idempotents (aka "automorphic numbers")

18 votes
3 answers
550 views

Does there exist something like an $H_3$ and $H_4$ (icosahedral) Lie algebra or algebraic group?

17 votes
0 answers
350 views

Joyal's topos in which $[0,1]$ fails to be compact

17 votes
2 answers
560 views

In the internal language of the topos of sheaves on a topological space, can we define locally constant real-valued functions?

16 votes
1 answer
414 views

Examples of statements that are valid in every spatial topos

16 votes
1 answer
461 views

Where can I learn more about the topology on $\mathbb{R}$ induced by the map $\mathbb{R} \to \prod_{a>0} (\mathbb{R}/a\mathbb{Z})$?

16 votes
1 answer
2k views

What does "game theory" cover and how should it be called?

15 votes
0 answers
403 views

The Monster Moonshine Module from the engineering or algorithmic point of view

15 votes
2 answers
403 views

Constructing $E_8$ from its branching to $A_8$

15 votes
1 answer
420 views

Is there a conceptual reason why so many triplets of lines in a triangle are concurrent?

15 votes
2 answers
666 views

Coordinates of the Weyl vector of $E_8$ (and the 135 classes of $W(E_8)/W(D_8)$)

14 votes
2 answers
723 views

Global homological dimension of group rings

1
2 3 4 5 6