Skip to main content
Mathematics

Favorite Question

 Favorite Question
Question saved by 25 users. This badge can be awarded multiple times.
Awarded 3292 times.
Can rotations in 4D be given an explicit matrix form?
Awarded Sep 12, 2024 at 4:41
Isometric embedding
Awarded Sep 12, 2024 at 2:06
$\ell^p\subseteq\ell^q$ for $0<p<q<\infty$ and $\|\cdot\|_q<\|\cdot\|_p$ [duplicate]
Awarded Sep 12, 2024 at 1:36
Distinguished triangle induced by short exact sequence
Awarded Sep 9, 2024 at 3:36
What is the fastest/most efficient algorithm for estimating Euler's Constant $\gamma$?
Awarded Sep 8, 2024 at 16:36
How many k-dimensional subspaces there are in n-dimensional vector space over $\mathbb F_p$?
Awarded Sep 7, 2024 at 20:48
the equivalence between paracompactness and second countablity in a locally Euclidean and $T_2$ space
Awarded Sep 6, 2024 at 16:11
What's the difference between stochastic and random?
Awarded Sep 6, 2024 at 0:08
Is every axiom in the definition of a vector space necessary?
Awarded Sep 1, 2024 at 17:18
When are two semidirect products isomorphic?
Awarded Sep 1, 2024 at 11:57
Diophantine equation $a^2+b^2=c^2+d^2$
Awarded Aug 30, 2024 at 12:55
What is the antiderivative of $e^{-x^2}$
Awarded Aug 29, 2024 at 23:46
Are the natural numbers implicit in the construction of first-order logic? If so, why is this acceptable?
Awarded Aug 27, 2024 at 9:26
Under the Curry-Howard correspondence or loosely "proofs-as-programs", do we also have "programs-as-proofs" and what would some arb. program prove?
Awarded Aug 26, 2024 at 5:10
What is the equation of a general circle in 3-D space?
Awarded Aug 23, 2024 at 18:25
Connected metric spaces with at least 2 points are uncountable.
Awarded Aug 18, 2024 at 21:17
Prove that if $g^2=e$ for all $g$ in $G$ then $G$ is Abelian.
Awarded Aug 11, 2024 at 8:16
Bijection $f\colon\mathbb{N}\to\mathbb{N}$ with $f(0)=0$ and $|f(n)-f(n-1)|=n$
Awarded Aug 9, 2024 at 9:28
7 fishermen caught exactly 100 fish and no two had caught the same number of fish. Then there are three who have together captured at least 50 fish.
Awarded Aug 3, 2024 at 16:26
What is an operator in mathematics?
Awarded Aug 3, 2024 at 14:54
what does `ensemble average` mean?
Awarded Jul 30, 2024 at 8:35
Poincare Duality Reference
Awarded Jul 28, 2024 at 11:55
Summing (0,1) uniform random variables up to 1 [duplicate]
Awarded Jul 28, 2024 at 11:27
What is the "topology induced by a metric"?
Awarded Jul 27, 2024 at 6:13
Meaning of the spectral norm of a matrix
Awarded Jul 26, 2024 at 23:56
Show that the dual norm of the spectral norm is the nuclear norm
Awarded Jul 25, 2024 at 20:11
Quantum mechanical books for mathematicians
Awarded Jul 24, 2024 at 7:24
What does the function f: x ↦ y mean?
Awarded Jul 22, 2024 at 21:08
An example of a derivation at a point on a $C^k$-manifold which is not a tangent vector
Awarded Jul 20, 2024 at 20:47
Product of all monic irreducibles with degree dividing $n$ in $\mathbb{F}_{q}$?
Awarded Jul 20, 2024 at 9:25
weak convergence in $L^p$ plus convergence of norm implies strong convergence
Awarded Jul 18, 2024 at 13:47
Does the Levi-Civita connection determine the metric?
Awarded Jul 15, 2024 at 14:24
Examples where it is easier to prove more than less
Awarded Jul 13, 2024 at 0:20
Find all connected covering space of $\mathbb RP^2\vee \mathbb RP^2$
Awarded Jul 12, 2024 at 0:27
Determinant of the Kronecker Product of Two Matrices
Awarded Jul 9, 2024 at 6:03
Moment generating functions/ Characteristic functions of $X,Y$ factor implies $X,Y$ independent.
Awarded Jul 5, 2024 at 20:10
Does taking the direct limit of chain complexes commute with taking homology?
Awarded Jul 3, 2024 at 13:35
Why consider square-integrable functions?
Awarded Jul 1, 2024 at 22:06
Proving that the dual of the $\mathcal{l}_p$ norm is the $\mathcal{l}_q$ norm.
Awarded Jul 1, 2024 at 2:08
Galois group of a biquadratic quartic
Awarded Jun 30, 2024 at 6:58
Prove: $\binom{n}{k}^{-1}=(n+1)\int_{0}^{1}x^{k}(1-x)^{n-k}dx$ for $0 \leq k \leq n$
Awarded Jun 29, 2024 at 16:10
Failure of isomorphisms on stalks to arise from an isomorphism of sheaves
Awarded Jun 28, 2024 at 19:32
Zorn's Lemma And Axiom of Choice
Awarded Jun 27, 2024 at 18:41
What's the best way to measure mathematical ability?
Awarded Jun 26, 2024 at 13:20
How can I find a mod with negative number? [duplicate]
Awarded Jun 24, 2024 at 18:31
Solving linear congruences by hand: modular fractions and inverses
Awarded Jun 24, 2024 at 16:55
An entire function whose real part is bounded above must be constant.
Awarded Jun 22, 2024 at 12:40
The Typewriter Sequence
Awarded Jun 22, 2024 at 11:49
How do I integrate the following? $\int{\frac{(1+x^{2})\mathrm dx}{(1-x^{2})\sqrt{1+x^{4}}}}$
Awarded Jun 20, 2024 at 15:16
What is the correct way to self learn from a textbook?
Awarded Jun 19, 2024 at 19:04
Self teaching Galois Theory
Awarded Jun 18, 2024 at 22:46
Tensor products of functions generate dense subspace?
Awarded Jun 18, 2024 at 7:34
Sheaves and complex analysis
Awarded Jun 16, 2024 at 22:30
How to choose correct strategy for irreducibility testing in $\mathbb{Z}[X]$?
Awarded Jun 16, 2024 at 13:10
Splitting of conjugacy class in alternating group
Awarded Jun 13, 2024 at 14:10
The Modulus of all the roots of a Polynomial are equal to $1$
Awarded Jun 11, 2024 at 19:15
Concrete FFT polynomial multiplication example
Awarded Jun 9, 2024 at 9:56
Prove that 1+1=2 [duplicate]
Awarded Jun 5, 2024 at 21:36
Show that a continuous function has a fixed point
Awarded Jun 5, 2024 at 15:04
Absolutely continuous functions
Awarded Jun 4, 2024 at 14:16
1 2 3
4
5
…
55