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35
Answers
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activity
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15
Examples of interesting false proofs
Jan 14 '13 at 16:10
11
Is equality of terms for “real” numbers with roots, logarithm, exponential, sin, cos, and other trigonometric operations decidable with a Turing-machine?
Jan 15 '13 at 18:50
10
Wanted, dead or alive: Have you seen this curve? (circular variant of cardioid)
Jan 25 at 23:57
9
Has there been a computer search for a 5-chromatic unit distance graph?
Apr 16 at 14:04
9
Expressing $SO_8$ element as product of $L_u$ and $R_u$ for unit octonions $u$
Apr 14 at 13:35
7
Lower bound on the irrationality measure of $\pi$
Aug 18 '14 at 21:00
6
Zero knowledge proof of equality
Apr 17 at 19:03
6
The difference between the Recursive and the Effective topos.
Jun 22 '14 at 21:46
5
Is $\omega^\frac{1}{\omega} > n \forall n \in \mathbb{N}$?
Apr 21 at 18:26
5
Stronger form of connectedness than path-connectedness
Mar 31 at 12:48
5
“Converse” of Taylor's theorem
Aug 30 '14 at 22:51
4
Gcd of polynomials over a finite field
May 20 at 13:44
4
Self-containing trees
Apr 27 at 22:38
4
an algebraic variety for a boolean circuit
Apr 27 at 16:35
4
Languages beyond enumerable
Apr 21 at 14:01
4
Computability of Brauer groups
Jun 17 '15 at 16:17
3
Let's keep adding once undecidable statements
Jun 15 at 14:06
3
What are some examples of narrowly missed discoveries in the history of mathematics?
Apr 10 at 13:43
3
Hilbert's 17th Problem for smooth functions
Aug 20 '14 at 9:33
3
An exercise about Tor
Apr 15 '13 at 13:31
2
Convergence of Riemann integrals that do not hold for Lebesgue integrals
Jun 29 at 19:12
2
Does there exist an Affinization or Projectivization process for Varieties?
May 9 at 13:02
2
Least inner model of ZF without power set axiom
Apr 11 at 16:48
2
Is there a modern account of Veblen functions of *several* variables?
Apr 7 at 22:22
2
Vector spaces without natural bases
Mar 30 at 12:26
2
Isolating roots of polynomial system
Mar 18 at 0:49
2
Proof strength of Calculus of (Inductive) Constructions
Dec 8 '12 at 17:07
1
Most intricate and most beautiful structures in mathematics
Jul 10 at 21:47
1
Between mu- and primitive recursion
Jan 16 at 23:11
1
Applications of Representation Theory in Combinatorics
Dec 13 '15 at 21:02
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