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Accepted answer and score of 40 or more. This badge can be awarded multiple times.
Awarded 969 times.
Does iterating the derivative infinitely many times give a smooth function whenever it converges?
Awarded Jan 7, 2022 at 8:21
How do pure mathematicians assess whether their research ambitions can be realistically achieved?
Awarded Jan 5, 2022 at 23:18
Serre intersection formula and derived algebraic geometry?
Awarded Dec 21, 2021 at 11:58
Ideas for introducing Galois theory to advanced high school students
Awarded Dec 17, 2021 at 10:20
Why are the integers with the cofinite topology not path-connected?
Awarded Dec 16, 2021 at 12:41
Completion of a category
Awarded Dec 15, 2021 at 11:01
How many square roots can a non-identity element in a group have?
Awarded Dec 15, 2021 at 0:03
Why are the numbers counting "ever-closer" lattice paths so round?
Awarded Nov 29, 2021 at 22:35
Is there a closed form for $\int_0^\infty\frac{\tanh^3(x)}{x^2}dx$?
Awarded Nov 20, 2021 at 0:52
Pullback measures
Awarded Nov 8, 2021 at 10:49
What does the σ in σ-algebra stand for?
Awarded Nov 7, 2021 at 22:05
Is there a "simplification" functor in algebraic topology?
Awarded Nov 6, 2021 at 0:56
Can a vector space over an infinite field be a finite union of proper subspaces?
Awarded Oct 23, 2021 at 11:31
What are "variational crimes" and who coined the term?
Awarded Oct 14, 2021 at 13:56
How can an extremely mathematically talented young person be helped to fulfill his/her potential?
Awarded Oct 4, 2021 at 21:18
Is rigour just a ritual that most mathematicians wish to get rid of if they could?
Awarded Oct 4, 2021 at 21:18
Mathematical explanation of the failure to quantize gravity naively
Awarded Oct 4, 2021 at 19:21
What is the p-adic valuation of a number?
Awarded Sep 19, 2021 at 2:07
Golden ratio in contemporary mathematics
Awarded Sep 14, 2021 at 16:30
A learning roadmap for algebraic geometry
Awarded Sep 13, 2021 at 8:26
Category theory and set theory: just a different language, or different foundation of mathematics?
Awarded Sep 4, 2021 at 16:15
Why the name 'separable' space?
Awarded Sep 3, 2021 at 14:34
How do we give mathematical meaning to 'physical dimensions'?
Awarded Aug 27, 2021 at 13:55
Is this proof of Perron's theorem correct, and if so is it original?
Awarded Aug 27, 2021 at 6:46
Is there a "quantum" Riemann zeta function?
Awarded Aug 23, 2021 at 17:35
The finite subgroups of SU(n)
Awarded Aug 23, 2021 at 7:41
Closed formula for a certain infinite series
Awarded Aug 10, 2021 at 1:51
What manifolds are bounded by RP^odd?
Awarded Aug 5, 2021 at 22:18
Random walk inside a random walk inside...
Awarded Aug 1, 2021 at 15:50
How true are theorems proved by Coq?
Awarded Jul 31, 2021 at 21:51
Visibility of vertices in polyhedra
Awarded Jul 24, 2021 at 10:35
What is a cumulant really?
Awarded Jul 20, 2021 at 7:41
Why do we have two theorems when one implies the other?
Awarded Jul 12, 2021 at 6:35
Why should I care about the Jones polynomial?
Awarded Jul 5, 2021 at 14:36
When are probability distributions completely determined by their moments?
Awarded Jun 30, 2021 at 19:02
Conjectures or Results?
Awarded Jun 28, 2021 at 18:18
nontrivial $\pi_2(\textrm{Diff}(M))$
Awarded Jun 17, 2021 at 10:20
Have there been any updates on Mochizuki's proposed proof of the abc conjecture?
Awarded Jun 14, 2021 at 23:15
What's the bijection between reals and infinite sequences of integers?
Awarded Jun 13, 2021 at 20:11
What is a Lagrangian submanifold intuitively?
Awarded Jun 13, 2021 at 12:55
Adjacency matrices of graphs
Awarded Jun 6, 2021 at 6:35
Examples of algorithms requiring deep mathematics to prove correctness
Awarded Jun 4, 2021 at 2:47
Are there "principal" bundles $S^1 \to S^3 \to S^2$ other then Hopf's? (They would be necessarily not locally trivial)
Awarded May 18, 2021 at 8:42
How did Lefschetz do mathematics without hands?
Awarded May 12, 2021 at 8:03
Do finite groups acting on a ball have a fixed point?
Awarded May 1, 2021 at 9:15
Intuition for coends
Awarded Apr 17, 2021 at 18:57
Can a topos ever be an abelian category?
Awarded Apr 10, 2021 at 21:27
How to prove that the solution to $x^{x+1}=(x+1)^{x}$ is transcendental?
Awarded Apr 8, 2021 at 0:01
Simplest examples of rings that are not isomorphic to their opposites
Awarded Apr 6, 2021 at 18:06
Are submodules of free modules free?
Awarded Apr 3, 2021 at 6:31
Synthetic vs. classical differential geometry
Awarded Mar 24, 2021 at 19:40
Wrong asymptotics of OEIS A000607 (number of partitions of an integer in prime parts)?
Awarded Mar 21, 2021 at 16:19
Are there situations when regarding isomorphic objects as identical leads to mistakes?
Awarded Mar 18, 2021 at 0:21
Usefulness of Nash embedding theorem
Awarded Mar 15, 2021 at 17:30
Are there any non-linear solutions of Cauchy's equation $f(x+y)=f(x)+f(y)$ without assuming the Axiom of Choice?
Awarded Mar 14, 2021 at 2:21
What are the recommended books for an introductory study of elliptic curves?
Awarded Mar 12, 2021 at 18:25
The "square root" of a graph?
Awarded Mar 3, 2021 at 17:19
Compact open topology
Awarded Feb 26, 2021 at 13:10
Is $O_n({\bf Q})$ dense in $O_n({\bf R})$?
Awarded Feb 23, 2021 at 13:36
Do vector spaces without choice satisfy Cantor-Schroeder-Bernstein?
Awarded Feb 14, 2021 at 17:51
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