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Nice Answer

 Nice Answer
Answer score of 10 or more. This badge can be awarded multiple times.
Awarded 38353 times.
Is Mac Lane still the best place to learn category theory?
Awarded Sep 29, 2017 at 15:42
Error to sum of Euler phi-functions
Awarded Sep 29, 2017 at 11:36
Tannakian Formalism for the Quaternions and Dihedral Group
Awarded Sep 29, 2017 at 11:24
In what rigorous sense are Sperner's Lemma and the Brouwer Fixed Point Theorem equivalent?
Awarded Sep 29, 2017 at 10:22
What is the fundamental group of $\mathcal O_{\mathbb P^n}(k)$ minus the zero section
Awarded Sep 29, 2017 at 6:42
Is the series $\sum_n|\sin n|^n/n$ convergent?
Awarded Sep 29, 2017 at 2:44
How to check if a box fits in a box?
Awarded Sep 28, 2017 at 23:24
The $n$-th derivative has $n$ zeros. Can such a function be unbounded?
Awarded Sep 28, 2017 at 20:59
Splitting the Resultant, as when the Determinant becomes the square of the Pfaffian
Awarded Sep 28, 2017 at 9:26
How to check if a box fits in a box?
Awarded Sep 28, 2017 at 8:34
Why there is a relation among the second-order minors of a symmetric $4\times 4$ matrix?
Awarded Sep 28, 2017 at 8:29
How do you approach your child's math education?
Awarded Sep 28, 2017 at 7:48
Integrating a family of vector spaces
Awarded Sep 28, 2017 at 0:39
An elementary question about a sequence of numbers
Awarded Sep 27, 2017 at 22:16
Simple recurrence that fails to be integer for the first time at the 44th term
Awarded Sep 27, 2017 at 21:14
A diophantine equation in $\mathbb{N}$
Awarded Sep 27, 2017 at 20:21
Question Regarding Riemann-Hurwitz Formula Proof
Awarded Sep 27, 2017 at 9:10
Can you have a spherical plane?
Awarded Sep 27, 2017 at 9:05
MathSciNet Reference Fixes
Awarded Sep 27, 2017 at 6:16
Derivators (in English)
Awarded Sep 27, 2017 at 2:38
Sum of the divisor function over integers with restricted prime factors
Awarded Sep 26, 2017 at 20:29
Determinant is to Pfaffian as resultant is to what?
Awarded Sep 26, 2017 at 15:33
Can a sphere glued into a soft 3d-mattress rotate continuously? (manifolds, SU(2) and the belt trick)
Awarded Sep 26, 2017 at 12:55
Is a topological fiber-bundle, whose total space admits a retraction onto a fiber, trivial?
Awarded Sep 26, 2017 at 10:18
What can we learn from the tropicalization of an algebraic variety?
Awarded Sep 26, 2017 at 8:28
Proofs without words
Awarded Sep 26, 2017 at 8:13
Cutting a rectangle into an odd number of congruent non-rectangular pieces
Awarded Sep 25, 2017 at 22:56
Books you would like to read (if somebody would just write them…)
Awarded Sep 25, 2017 at 18:43
Maxwell's equations and differential forms
Awarded Sep 25, 2017 at 18:18
An endomorphism of free groups
Awarded Sep 25, 2017 at 16:28
Infinite sets of primes of density 0
Awarded Sep 25, 2017 at 12:07
Is there always one integer between these two rational numbers?
Awarded Sep 25, 2017 at 9:06
Is the polynomial de Rham functor a Quillen equivalence?
Awarded Sep 25, 2017 at 7:10
Can one embed two division rings in a common one?
Awarded Sep 25, 2017 at 3:38
What are the differences between Woodin and Sy Friedman regarding set theoretic truths?
Awarded Sep 24, 2017 at 13:44
Is it normal surface of general type to have infinitely many positive rank elliptic curves?
Awarded Sep 24, 2017 at 6:41
Existence of (smooth) models
Awarded Sep 24, 2017 at 4:22
What are the most overloaded words in mathematics?
Awarded Sep 24, 2017 at 0:59
Is a topological fiber-bundle, whose total space admits a retraction onto a fiber, trivial?
Awarded Sep 23, 2017 at 21:16
How to prove that a monotone function is differentiable at some point?
Awarded Sep 23, 2017 at 10:28
Random Alternating Permutations
Awarded Sep 23, 2017 at 10:28
Geometric intuition for Fontaine-Wintenberger?
Awarded Sep 22, 2017 at 18:26
A question concerning how mathematicians feel about theorems and their proofs.
Awarded Sep 22, 2017 at 14:52
Visibility of vertices in polyhedra
Awarded Sep 22, 2017 at 12:43
Does the image of the exponential map generate the group?
Awarded Sep 22, 2017 at 9:52
Russian Equivalent of Big Rudin
Awarded Sep 22, 2017 at 0:44
What do the stable homotopy groups of spheres say about the combinatorics of finite sets?
Awarded Sep 21, 2017 at 20:52
Mathematical games interesting to both you and a 5+-year-old child
Awarded Sep 21, 2017 at 19:26
Refining topologies to make them Hausdorff
Awarded Sep 21, 2017 at 13:03
How to classify continuous maps from 2-spheres to 2-spheres with n fixed points?
Awarded Sep 21, 2017 at 13:03
Sets in constructive mathematics
Awarded Sep 21, 2017 at 11:47
cut-elimination provable in PRA
Awarded Sep 21, 2017 at 10:53
What are your favorite instructional counterexamples?
Awarded Sep 21, 2017 at 10:26
What are your favorite instructional counterexamples?
Awarded Sep 21, 2017 at 9:59
Mathematical games interesting to both you and a 5+-year-old child
Awarded Sep 21, 2017 at 1:29
Examples of interesting non orientable closed 3-manifolds
Awarded Sep 20, 2017 at 20:26
Negative sectional curvature and constant curvature
Awarded Sep 20, 2017 at 20:21
Why is the catalecticant invariant under coordinate changes?
Awarded Sep 20, 2017 at 19:59
Cancelling a graph join from a graph homomorphism
Awarded Sep 20, 2017 at 18:42
Picturing a Certain Torus and Klein Bottle
Awarded Sep 20, 2017 at 18:04
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