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Accepted answer and score of 40 or more. This badge can be awarded multiple times.
Awarded 969 times.
Can one explain Tannaka-Krein duality for a finite-group to ... a computer ? (How to make input for reconstruction to be finite datum?)
Awarded 20 hours ago
Deformation theory and differential graded Lie algebras
Awarded Dec 7 at 15:05
Maneuvering with limited moves on $S^2$
Awarded Dec 3 at 10:56
How hard is it to compute the Euler totient function?
Awarded Nov 29 at 17:55
Do "surjective" degree zero maps exist?
Awarded Nov 29 at 17:23
Reason for studying coherent sheaves on complex manifolds.
Awarded Nov 26 at 18:26
Why is the exterior algebra so ubiquitous?
Awarded Nov 24 at 23:04
Tying knots with reflecting lightrays
Awarded Nov 22 at 5:40
Has decidability got something to do with primes?
Awarded Nov 22 at 4:02
What is a simplicial commutative ring from the point of view of homotopy theory?
Awarded Nov 21 at 10:45
The letter $\wp$; Name & origin?
Awarded Nov 15 at 8:00
How does assuming GRH help us calculate class group?
Awarded Nov 9 at 11:04
How should I think about presentable $\infty$-categories?
Awarded Nov 8 at 15:47
Presburger Arithmetic
Awarded Nov 6 at 13:55
What is a topos?
Awarded Nov 1 at 21:12
Can a countable union of two-element sets be uncountable?
Awarded Oct 13 at 20:20
Boundedness of sum of sin(sin(n))
Awarded Oct 9 at 9:24
Is there mathematical significance to the LaGuardia floor tiles?
Awarded Sep 13 at 14:07
Analogue of Fermat's "little" theorem
Awarded Sep 10 at 14:30
Connected sum of topological manifolds
Awarded Sep 2 at 8:32
difference between equivalence relations on algebraic cycles
Awarded Aug 30 at 17:08
What are "good" examples of spin manifolds?
Awarded Aug 29 at 16:16
Is there a natural way to view the proof of Hilbert 90?
Awarded Aug 25 at 8:04
Is number of different sums monotone?
Awarded Jul 30 at 15:04
What is the standard 2-generating set of the symmetric group good for?
Awarded Jul 27 at 21:51
what is $\mathrm{Bun}(G)$?
Awarded Jul 20 at 12:32
Proof of "Possible new series for $\pi$" without use of physics
Awarded Jul 19 at 14:07
Assuming the Collatz conjecture is false, what is known about the size of the false set?
Awarded Jun 21 at 17:06
How decreasing can a bijection $f:\mathbb{N}\to\mathbb{N}$ be?
Awarded Jun 16 at 17:12
Is $1/F$ Schwartz if $F$ is "reverse Schwartz"?
Awarded Jun 6 at 11:02
A proof of the salamander lemma without Mitchell's embedding theorem?
Awarded Jun 5 at 2:36
Why is conformal invariance only possible for massless theories?
Awarded May 21 at 3:09
Understanding the definition of the Lefschetz (pure effective) motive
Awarded May 19 at 6:33
What is the relationship between modular forms and Maass forms?
Awarded May 16 at 16:03
Is there any way to rewrite a partial differential equation using language of differential forms, tensors, etc?
Awarded May 14 at 19:21
Smooth vs regular vs non-singular
Awarded May 9 at 19:20
Does every series of hyperreal numbers converge to some hyperreal number?
Awarded May 7 at 19:08
Who wins two player sudoku?
Awarded May 7 at 3:36
Is the fundamental group functor a left-adjoint?
Awarded Apr 26 at 20:17
Applications of nonconstructive mathematics
Awarded Apr 17 at 12:18
A conjecture in Number Theory
Awarded Apr 15 at 16:06
Global character of ABC/Szpiro inequalities
Awarded Mar 29 at 23:50
What are some open problems in algebraic geometry?
Awarded Mar 28 at 15:17
Etale cohomology and l-adic Tate modules
Awarded Mar 24 at 4:11
Are all sets totally ordered ?
Awarded Mar 21 at 22:47
Isometry group of a homogeneous space
Awarded Mar 17 at 10:51
Are there proofs that you feel you did not "understand" for a long time?
Awarded Mar 14 at 22:42
Which unfoldings of the hypercube tile 3-space: How to check for isometric space-fillers?
Awarded Mar 12 at 21:21
Does there exist a graph with maximum degree 8, chromatic number 8, clique number 6?
Awarded Mar 4 at 11:47
Is every polynomial of the form $2x^{2n} -x^n +1$ irreducible over $\mathbb{Z}$?
Awarded Feb 18 at 18:26
Elementary proof of Riemann-Roch for compact Riemann surfaces
Awarded Feb 17 at 1:50
How to write mathematics without typing?
Awarded Feb 12 at 1:05
What is a coalgebra intuitively?
Awarded Feb 2 at 23:42
Automatically solving olympiad geometry problems
Awarded Jan 21 at 0:50
Do we lose any solutions when applying separation of variables to partial differential equations?
Awarded Jan 19 at 10:08
Mark Hovey's open problems in the theory of model categories
Awarded Jan 18 at 13:05
The sets in mathematical logic
Awarded Jan 13 at 18:51
Requesting a referee's report on my paper from a math journal
Awarded Jan 13 at 15:34
Known and fixed gaps in the proof of the CFSG
Awarded Jan 9 at 2:02
What is the Krull dimension of the ring of holomorphic functions on a complex manifold?
Awarded Jan 3 at 17:25
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