12

Questions
votes newest views recent
1
-3
votes
3
answers
503
views

Where is the belly button of the Universe? [closed]

may 25 at 3:47 Charles Staats 4,189●1●20●47

1
11
votes
2
answers
542
views

Anything special (historical?) about surface $x\cdot y\cdot z\ +\ x+y+z=0$?

may 26 at 0:43 Joseph O'Rourke 44.1k●1●50●216

8
14
votes
5
answers
1k
views

Why did Bourbaki ignore the theory of categories? [closed]

may 24 at 23:25 Wlodzimierz Holsztynski 1,214●5●12

4
10
votes
2
answers
256
views

Do operations generate well-ordered sets only?

may 23 at 14:29 Emil Jeřábek 10.8k●1●27●42

 
4
votes
2
answers
224
views

Are sums of the inverses of prime siblings finite?

may 21 at 7:39 Wlodzimierz Holsztynski 1,214●5●12

 
1
vote
1
answer
105
views

General and translational Birkhoff lattices. Equational classes.

may 17 at 1:33 Wlodzimierz Holsztynski 1,214●5●12

2
7
votes
0
answers
214
views

Can a composition with itself of a universal self-map be non-universal?

may 16 at 6:42 Wlodzimierz Holsztynski 1,214●5●12

2
2
votes
2
answers
456
views

A characterization of Hilbert spaces?

may 12 at 22:16 Sergei Ivanov 22.8k●46●95

 
0
votes
0
answers
112
views

Is there a better function (linear or even a projection)?

may 19 at 5:41 Wlodzimierz Holsztynski 1,214●5●12

 
1
vote
0
answers
60
views

What are the minimal numbers of $(2\ 2)$-tetrahedra?

feb 20 at 6:15 Wlodzimierz Holsztynski 1,214●5●12

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