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Accepted answer and score of 40 or more. This badge can be awarded multiple times.
Awarded 929 times.
A mysterious connection between primes and $\pi$
Awarded Dec 17, 2019 at 13:10
A good book of functional analysis
Awarded Dec 12, 2019 at 3:50
Kirby calculus and local moves
Awarded Dec 6, 2019 at 23:25
Do we have non-abelian sheaf cohomology?
Awarded Nov 26, 2019 at 17:15
Is there an analogue of curvature in algebraic geometry?
Awarded Nov 22, 2019 at 16:45
(Short) Exact sequences with no commutative diagram between them
Awarded Nov 21, 2019 at 17:25
Is there a Whitney Embedding Theorem for non-smooth manifolds?
Awarded Nov 20, 2019 at 9:25
What is (co)homology, and how does a beginner gain intuition about it?
Awarded Nov 2, 2019 at 9:50
Blackboard rendering of math fonts
Awarded Nov 1, 2019 at 17:25
A slick proof of the Bruhat Decomposition for GL_n(k)?
Awarded Oct 23, 2019 at 7:55
What is "Teichmüller Theory" and its history?
Awarded Oct 15, 2019 at 21:35
Is Cauchy induction used for proofs other than for AM–GM?
Awarded Sep 24, 2019 at 9:15
The "Dzhanibekov effect" - an exercise in mechanics or fiction? Explain mathematically a video from a space station
Awarded Sep 21, 2019 at 12:55
Why forgetful functors usually have LEFT adjoint?
Awarded Sep 19, 2019 at 0:50
Are there some other notions of "curvature" which measure how space curves?
Awarded Sep 13, 2019 at 18:40
Questions about the Bernstein center of a $p$-adic reductive group
Awarded Sep 12, 2019 at 7:50
How should a "working mathematician" think about sets? (ZFC, category theory, urelements)
Awarded Sep 11, 2019 at 20:10
Why is so much work done on numerical verification of the Riemann Hypothesis?
Awarded Aug 31, 2019 at 17:50
How can I improve my formal definitions?
Awarded Aug 31, 2019 at 14:40
Is the Riemann Hypothesis equivalent to a $\Pi_1$ sentence?
Awarded Aug 31, 2019 at 13:10
Which polygons can be turned inside out by a smooth deformation?
Awarded Aug 29, 2019 at 23:25
Why doesn't mathematics collapse even though humans quite often make mistakes in their proofs?
Awarded Aug 27, 2019 at 18:05
When is one 'ready' to make original contributions to mathematics?
Awarded Aug 24, 2019 at 21:10
A conjectural trigonometric identity
Awarded Aug 22, 2019 at 22:50
Why are fusion categories interesting?
Awarded Aug 15, 2019 at 22:20
In a topological space if there exists a loop that cannot be contracted to a point does there exist a simple loop that cannot be contracted also?
Awarded Aug 10, 2019 at 14:40
Can a conditionally convergent series of vectors be rearranged to give any limit?
Awarded Jul 30, 2019 at 18:10
Is $L^2(\mathbb R)$ homeomorphic to $L^1(\mathbb R)$?
Awarded Jul 14, 2019 at 12:55
Lawvere's "Some thoughts on the future of category theory."
Awarded Jul 11, 2019 at 1:50
When is $L^2(X)$ separable?
Awarded Jul 9, 2019 at 9:00
Generating finite simple groups with $2$ elements
Awarded Jul 1, 2019 at 5:00
Physical meaning of the Lebesgue measure
Awarded Jun 26, 2019 at 9:55
Connectedness and the real line
Awarded Jun 18, 2019 at 14:55
In what respect are univalent foundations "better" than set theory?
Awarded Jun 11, 2019 at 11:35
Map of Number Theory
Awarded Jun 5, 2019 at 4:15
How feasible is it to prove Kazhdan's property (T) by a computer?
Awarded Jun 1, 2019 at 14:40
Why are free groups residually finite?
Awarded May 29, 2019 at 20:00
Does the hypergraph structure of the set of subgroups of a finite group characterize isomorphism type?
Awarded May 26, 2019 at 7:35
The canonical line bundle of a normal variety
Awarded May 25, 2019 at 20:20
Undergraduate math research
Awarded May 24, 2019 at 14:35
Are there any solutions to $2^n-3^m=1$?
Awarded May 23, 2019 at 20:30
For consecutive primes $a\lt b\lt c$, prove that $a+b\ge c$.
Awarded May 22, 2019 at 15:20
Why is the Eisenstein ideal paper so great?
Awarded May 21, 2019 at 5:40
Krull dimension less or equal than transcendence degree?
Awarded May 15, 2019 at 13:05
Examples where existence is harder than evaluation
Awarded May 9, 2019 at 22:10
Have the tides ever turned twice on any open problem?
Awarded May 9, 2019 at 1:50
Intuition behind the Eichler-Shimura relation?
Awarded May 7, 2019 at 17:01
Simplest examples of nonisomorphic complex algebraic varieties with isomorphic analytifications
Awarded May 6, 2019 at 13:25
A “mother of all groups”? What kind of structures have "mother of all"s?
Awarded Apr 26, 2019 at 6:00
Solving NP problems in (usually) Polynomial time?
Awarded Apr 22, 2019 at 2:05
Mathematics of imaging the black hole
Awarded Apr 20, 2019 at 11:25
Circle $x^2 + y^2 = n!$ doesn't hit any lattice points for any $n$ except for $0$, $1$, $2$ and $6$ or does it?
Awarded Apr 18, 2019 at 14:25
Integrability of derivatives
Awarded Apr 13, 2019 at 22:00
Motivating the Casimir element
Awarded Apr 8, 2019 at 11:35
What did Ramanujan get wrong?
Awarded Mar 27, 2019 at 18:30
How do you show that $S^{\infty}$ is contractible?
Awarded Mar 13, 2019 at 22:45
Roots of permutations
Awarded Mar 13, 2019 at 22:00
Arithmetic Morse theory?
Awarded Mar 10, 2019 at 17:00
Which Kahler Manifolds are also Einstein Manifolds?
Awarded Mar 8, 2019 at 0:35
Smoothness of distance function in Riemannian Manifolds
Awarded Mar 7, 2019 at 18:00
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