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Mathematics

Favorite Question

 Favorite Question
Question saved by 25 users. This badge can be awarded multiple times.
Awarded 3292 times.
Relationship between inner product and norm
Awarded Dec 25, 2024 at 19:56
Simple proof Euler–Mascheroni $\gamma$ constant
Awarded Dec 25, 2024 at 17:57
Looking for closed-forms of $\int_0^{\pi/4}\ln^2(\sin x)\,dx$ and $\int_0^{\pi/4}\ln^2(\cos x)\,dx$
Awarded Dec 23, 2024 at 3:51
How to transform a general higher degree five or higher equation to normal form?
Awarded Dec 17, 2024 at 21:58
How do I know when a form represents an integral cohomology class?
Awarded Dec 17, 2024 at 11:25
The space of Riemannian metrics on a given manifold.
Awarded Dec 12, 2024 at 7:19
Computing the Smith Normal Form
Awarded Dec 9, 2024 at 11:30
Parabola is an ellipse, but with one focal point at infinity
Awarded Dec 6, 2024 at 15:08
Why isometric isomorphic between Banach spaces means we can identify them?
Awarded Dec 6, 2024 at 14:06
Krull dimension of $\mathbb{C}[x_1, x_2, x_3, x_4]/\left< x_1x_3-x_2^2,x_2 x_4-x_3^2,x_1x_4-x_2 x_3\right>$
Awarded Dec 3, 2024 at 13:37
Solving Rubik's cube and other permutation puzzles
Awarded Dec 2, 2024 at 8:50
Extending a function by continuity from a dense subset of a space
Awarded Nov 28, 2024 at 12:41
Integral over null set is zero
Awarded Nov 25, 2024 at 5:32
What are the differences between a fiber bundle and a sheaf?
Awarded Nov 23, 2024 at 11:00
The correspondence theorem for groups
Awarded Nov 18, 2024 at 19:01
An orthonormal set cannot be a basis in an infinite dimension vector space?
Awarded Nov 18, 2024 at 4:25
Filters vs nets in topology
Awarded Nov 16, 2024 at 10:08
A question about the proof that right-continuous modifications are indistinguishable.
Awarded Nov 15, 2024 at 10:31
Can all real polynomials be factored into quadratic and linear factors?
Awarded Nov 13, 2024 at 15:32
What are normal schemes intuitively?
Awarded Nov 13, 2024 at 12:10
block matrix multiplication
Awarded Nov 11, 2024 at 22:08
How to write \mathcal letters by hand? [closed]
Awarded Nov 10, 2024 at 10:47
tensor product with dual space
Awarded Nov 10, 2024 at 2:54
I want to start mathematics from scratch. What should I begin with?
Awarded Nov 8, 2024 at 18:46
Why isn't there a contravariant derivative? (Or why are all derivatives covariant?)
Awarded Nov 7, 2024 at 6:11
uniform random point in triangle in 3D
Awarded Nov 7, 2024 at 1:01
Why are orthogonal matrices generalizations of rotations and reflections?
Awarded Nov 4, 2024 at 23:21
Closed form for ${\large\int}_0^1\frac{\ln(1-x)\,\ln(1+x)\,\ln(1+2x)}{1+2x}dx$
Awarded Nov 1, 2024 at 15:15
Proving that $\int_0^1 \frac{\arctan x}{x}\ln\left(\frac{1+x^2}{(1-x)^2}\right)dx=\frac{\pi^3}{16}$
Awarded Nov 1, 2024 at 0:53
Closed form for $\int_0^\infty\frac{\sin x\,\cdot\,\operatorname{Ci}x-\cos x\,\cdot\,\operatorname{Si}x}{\sqrt{16\,x^2+1}}dx$
Awarded Oct 31, 2024 at 16:55
Weak solutions to the Neumann's problem (Evans PDE)
Awarded Oct 31, 2024 at 16:55
Proof that $\inf A = -\sup(-A)$
Awarded Oct 29, 2024 at 17:57
What would base $1$ be?
Awarded Oct 29, 2024 at 12:26
Spectrum of $\mathbb{Z}[x]$
Awarded Oct 28, 2024 at 19:15
Application of Liouville's Theorem
Awarded Oct 28, 2024 at 7:05
The Lebesgue integral of an integrable function is continuous
Awarded Oct 27, 2024 at 23:27
Proving $\left(1-\frac13+\frac15-\frac17+\cdots\right)^2=\frac38\left(\frac1{1^2}+\frac1{2^2}+\frac1{3^2}+\frac1{4^2}+\cdots\right)$
Awarded Oct 27, 2024 at 14:00
What is a good book to study classical projective geometry for the reader familiar with algebraic geometry?
Awarded Oct 25, 2024 at 6:21
Can the semidirect product of two groups be abelian group?
Awarded Oct 21, 2024 at 19:20
"Almost true": non-trivial claims that have exactly one counterexample
Awarded Oct 17, 2024 at 21:42
How to prove: Moment Generating Function Uniqueness Theorem
Awarded Oct 14, 2024 at 21:10
$\lim_{n\to \infty}f(nx)=0$ implies $\lim_{x\to \infty}f(x)=0$ [duplicate]
Awarded Oct 13, 2024 at 13:17
Where has this common generalization of nets and filters been written down?
Awarded Oct 12, 2024 at 15:56
Graph theory: adjacency vs incident
Awarded Oct 6, 2024 at 8:57
How can you prove that the square root of two is irrational?
Awarded Oct 4, 2024 at 3:23
Simplest way to get the lower bound $\pi > 3.14$
Awarded Oct 2, 2024 at 10:51
Who discovered this number-guessing paradox?
Awarded Oct 1, 2024 at 14:17
Rotation Matrix of rotation around a point other than the origin
Awarded Oct 1, 2024 at 10:12
Convergence of random variables in probability but not almost surely.
Awarded Sep 25, 2024 at 16:22
Tarski's decidability proof on real closed field and Peano arithmetic
Awarded Sep 25, 2024 at 16:22
Which finite groups are the group of units of some ring?
Awarded Sep 25, 2024 at 5:33
Proof that every number ≥ $8$ can be represented by a sum of fives and threes.
Awarded Sep 24, 2024 at 14:05
Automorphism group of direct product of groups
Awarded Sep 24, 2024 at 4:32
What is the integral of 0?
Awarded Sep 22, 2024 at 11:02
Integration with respect to a measure
Awarded Sep 21, 2024 at 22:38
Integral ${\large\int}_0^1\ln(1-x)\ln(1+x)\ln^2x\,dx$
Awarded Sep 20, 2024 at 16:46
tough integral involving $\sin(x^2)$ and $\sinh^2 (x)$
Awarded Sep 15, 2024 at 23:53
Galois group over $p$-adic numbers
Awarded Sep 14, 2024 at 12:11
What is special about the numbers 9801, 998001, 99980001 ..?
Awarded Sep 13, 2024 at 19:32
Why does L'Hôpital's rule work?
Awarded Sep 13, 2024 at 12:25
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