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Answer score of 25 or more. This badge can be awarded multiple times.
Awarded 7572 times.
Best known bounds on tensor rank of matrix multiplication of 3×3 matrices
Awarded 17 hours ago
Object of proven finiteness, yet with no algorithm discovered?
Awarded yesterday
Finite verification for theorems due to Busy Beaver numbers
Awarded Jul 16 at 23:50
Sets of algebraic integers whose differences are units
Awarded Jul 16 at 18:35
Categories First Or Categories Last In Basic Algebra?
Awarded Jul 16 at 3:17
Was lattice theory central to mid-20th century mathematics?
Awarded Jul 15 at 20:26
The octonions on a bad day
Awarded Jul 15 at 15:23
Finite verification for theorems due to Busy Beaver numbers
Awarded Jul 14 at 22:07
Unique smooth structure on 3-manifolds
Awarded Jul 12 at 1:08
Divergent series & continued fraction (from Gauss' mathematical diary)
Awarded Jul 11 at 20:33
Nontrivial theorems with trivial proofs
Awarded Jul 10 at 15:23
Where are Georg Cantor's Original Manuscripts?
Awarded Jul 10 at 12:04
Is there any research on set theory without extensionality axiom?
Awarded Jul 7 at 20:02
When is a Form a Kähler Form?
Awarded Jul 7 at 11:11
Possible new series for $\pi$
Awarded Jul 3 at 4:55
Proof of "Possible new series for $\pi$" without use of physics
Awarded Jul 2 at 21:33
Why is Oka's coherence theorem a deep result?
Awarded Jul 2 at 17:07
Is there a "geometric" intuition underlying the notion of normal varieties?
Awarded Jul 2 at 16:10
What is the most "concrete-feeling" equivalent formulation of the Continuum Hypothesis that you can think of?
Awarded Jul 1 at 12:05
Unnecessary uses of the axiom of choice
Awarded Jul 1 at 7:21
effective teaching
Awarded Jun 30 at 21:20
Research in mathematics without a degree in mathematics
Awarded Jun 28 at 18:03
Applications of mathematics in clinical setting
Awarded Jun 28 at 8:11
Why is the Vandermonde determinant harmonic?
Awarded Jun 28 at 6:15
What is the story behind the Chebyshev polynomials?
Awarded Jun 28 at 6:15
Applications of Categorical Logic to Logic
Awarded Jun 26 at 15:41
How to motivate constructible sheaves
Awarded Jun 26 at 14:45
Gossip about Grothendieck and distributive lattices
Awarded Jun 24 at 23:51
Revisiting the unreasonable effectiveness of mathematics
Awarded Jun 23 at 15:22
Colloquial catchy statements encoding serious mathematics
Awarded Jun 23 at 8:41
How are eigenvalues and eigenvectors affected by adding the all-ones matrix?
Awarded Jun 23 at 0:40
Galoisian sets of prime numbers
Awarded Jun 20 at 12:06
Is the blowup of a normal scheme necessarily normal?
Awarded Jun 19 at 11:05
How to introduce notions of flat, projective and free modules?
Awarded Jun 19 at 4:36
How decreasing can a bijection $f:\mathbb{N}\to\mathbb{N}$ be?
Awarded Jun 16 at 23:27
Does $V = \textit{Ultimate }L$ imply GCH?
Awarded Jun 16 at 21:34
What math institutes offer research in pairs/research in teams?
Awarded Jun 16 at 19:04
Euler characteristic of a manifold and self-intersection
Awarded Jun 16 at 6:00
What proportion of math papers are collaborative?
Awarded Jun 15 at 8:25
Is factorial definable using a $\Delta_0$ formula?
Awarded Jun 14 at 18:06
How decreasing can a bijection $f:\mathbb{N}\to\mathbb{N}$ be?
Awarded Jun 14 at 14:50
Is it known that the the sequence 7n+1 diverges to infinity starting with 7?
Awarded Jun 14 at 10:57
Is there a sheaf theoretical characterization of a differentiable manifold?
Awarded Jun 13 at 18:10
What makes a theorem *a* "nullstellensatz."
Awarded Jun 13 at 8:08
Is there a "weak" fundamental theorem of algebra for matrices?
Awarded Jun 13 at 1:40
What are examples of mathematical concepts named after the wrong people? (Stigler's law)
Awarded Jun 11 at 20:18
What are examples of mathematical concepts named after the wrong people? (Stigler's law)
Awarded Jun 11 at 19:51
A trigonometric equation: how hard could it be?
Awarded Jun 10 at 12:25
Equivalent forms of the P vs. NP problem
Awarded Jun 10 at 10:50
Approaches to Riemann hypothesis using methods outside number theory
Awarded Jun 9 at 8:30
A trigonometric equation: how hard could it be?
Awarded Jun 9 at 3:16
Uniformization theorem for Riemann surfaces
Awarded Jun 8 at 12:40
morphisms representable by algebraic spaces vs morphisms representable by schemes
Awarded Jun 7 at 16:48
Does the "three-set-lemma" imply the Axiom of Choice?
Awarded Jun 7 at 11:55
Is it always possible to write a scheme as a colimit of affine schemes?
Awarded Jun 7 at 1:25
Is $1/F$ Schwartz if $F$ is "reverse Schwartz"?
Awarded Jun 4 at 8:45
The true reason for the incompleteness of formal systems
Awarded Jun 1 at 22:32
A question regarding a claim of V. I. Arnold
Awarded Jun 1 at 19:09
How to understand the Harish-Chandra isomorphism?
Awarded Jun 1 at 19:09
A funny metric over $\mathbb{N}$
Awarded May 31 at 17:48
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