Popular Question - Badge - Mathematics Stack Exchange

Popular Question

Question with 1,000 views. This badge can be awarded multiple times.

Awarded 250323 times.

Understanding likelihood ratio in Neyman-Pearson Lemma

Awarded 2 days ago

Nikola

1,58817 silver badges29 bronze badges

Why is infinite intersections of all intervals $(-1/n, 1/n)$, where $n$ is positive integer, not open?

Awarded 2 days ago

al pal

2512 silver badges9 bronze badges

Helmholtz-Dirichlet Green's Function for unit ball - Explicit formula?

Awarded 2 days ago

Frank

6474 silver badges17 bronze badges

For given $n$, how to find integers $a_0, ..., a_n$ so that $\sum_{k=0}^n a_k x^k$ has $n$ distinct real roots and $\sum_{k=0}^n |a_k|$ is minimized?

Awarded 2 days ago

Dan

40.3k5 gold badges83 silver badges247 bronze badges

Floor function of powers of $2$

Awarded 2 days ago

user3141592

1,98513 silver badges27 bronze badges

Probability function letter case - What's the difference?

Awarded 2 days ago

user573180

2661 silver badge9 bronze badges

Proving that $\sigma_7(n) = \sigma_3(n) + 120 \sum_{m=1}^{n-1} \sigma_3(m)\sigma_3(n-m)$ without using modular forms?

Awarded 2 days ago

Bruno Joyal

56.3k8 gold badges142 silver badges243 bronze badges

Inverse of a symmetric tridiagonal matrix

Awarded 2 days ago

a06e

7,1597 gold badges40 silver badges83 bronze badges

Understanding the definition of Unique Factorization Domains

Awarded 2 days ago

Galois in the Field

8377 silver badges19 bronze badges

closed form solution to the heat equation

Awarded 2 days ago

moradipour

1215 bronze badges

How to get the primitive of $e^{-x^2}$?

Awarded 2 days ago

Matthieu Meunier

992 bronze badges

Proof - a vertex in a path has an even number of edges [duplicate]

Awarded 2 days ago

namesake22

1995 bronze badges

Adjoint of multiplication by $z$ in a Hilbert Space (Bergman space)

Awarded 2 days ago

dafinguzman

3,4972 gold badges23 silver badges32 bronze badges

How to prove law of the iterated logarithm

Awarded 2 days ago

Zigord

916 bronze badges

What is the definition of a scalar?

Awarded 2 days ago

Kieran Mullen

1909 bronze badges

Counting the number of unicyclic graphs

Awarded 2 days ago

Nawak

113 bronze badges

Evaluate $\sum_{n=-\infty}^{\infty}\frac{1}{(n-a)^2}$ with Poisson summation formula

Awarded 2 days ago

Sam Wong

2,51114 silver badges30 bronze badges

How can induction work on non-standard natural numbers?

Awarded 2 days ago

M. Winter

31k8 gold badges51 silver badges114 bronze badges

Existence of a monochromatic equilateral triangle on a 3-colour plane

Awarded 2 days ago

JackT

5812 silver badges15 bronze badges

Bounds on Gaussian infinite sum

Awarded 2 days ago

Joshua Meyers

1,3438 silver badges20 bronze badges

Why do some sources call calculus, "the calculus"?

Awarded 2 days ago

Ken - Enough about Monica

1991 silver badge13 bronze badges

3 of 10 products are defective and 5 are selected at random. Probability that sample includes all defective products

Awarded 2 days ago

Eric

313 bronze badges

maximal torus and semisimple elements

Awarded 2 days ago

scsnm

1,3418 silver badges16 bronze badges

Sum in Magic star puzzle

Awarded 2 days ago

Gregory Bones

493 bronze badges

Number of Dyck paths with k returns and b peaks

Awarded 2 days ago

user160371

1891 silver badge8 bronze badges

Analytical continuation and contour rotation

Awarded 2 days ago

An aedonist

2,43513 silver badges24 bronze badges

Closed form for $\sum_{k=0}^{n} \binom{n}{k}\frac{(-1)^k}{(k+1)^2}$

Awarded 2 days ago

Michael

1634 bronze badges

$f$ be an entire function, that is also injective. Then $f$ take the form $f(z) = az+b$ with $a, b \in \Bbb C$ and $a \neq 0$

Awarded 2 days ago

Frederick Manfred

9656 silver badges12 bronze badges

bijection between bilinear maps and linear map from tensor product

Awarded 2 days ago

alexanderyaacov

1855 bronze badges

Where’s the mistake? Find the side of the base of a regular triangular pyramid

Awarded 2 days ago

Human

395 bronze badges

Examples of Computations in Algebraic Topology

Awarded 2 days ago

Sam

16.5k2 gold badges61 silver badges113 bronze badges

Generating function for the partition function [duplicate]

Awarded 2 days ago

urpi

6491 gold badge4 silver badges12 bronze badges

Can you formulate a $ \phi, \theta $ restriction in spherical coordinates for a great circle?

Awarded 2 days ago

bobobobo

9,81221 gold badges76 silver badges92 bronze badges

Is there another 5 regular connected planar graph?

Awarded 2 days ago

licheng

2,8151 gold badge11 silver badges27 bronze badges

Plotting complex inequalities in maple

Awarded 2 days ago

Edward Evans

4,7991 gold badge21 silver badges48 bronze badges

Can all mathematical proof be represented visually? [closed]

Awarded 2 days ago

hwood87

1,3649 silver badges31 bronze badges

Space of Operators on a vector space

Awarded 2 days ago

lost_in_paradise

12 bronze badges

What angle is $\sin^{-1}(3/2)$?

Awarded 2 days ago

Mikael Sierra

231 silver badge8 bronze badges

$A^TA=B^TB$. Is $A=QB$ for some orthogonal $Q$?

Awarded 2 days ago

user41467

4602 silver badges13 bronze badges

Example of function that is Gâteaux-differentiable but not Fréchet-differentiable

Awarded 2 days ago

Falcon

4,5463 gold badges8 silver badges31 bronze badges

Summing up all $N$ digits automorphic numbers

Awarded 2 days ago

Quixotic

22.9k34 gold badges135 silver badges226 bronze badges

Geometric interpretation of the Kronecker product?

Awarded 2 days ago

nickponline

2595 silver badges15 bronze badges

Prove $\sum_{k=0}^{\infty}\frac{\Gamma(k+c)}{k!}{\rm B}(k+a,b)=\Gamma(c){\rm B}(a,b-c)$

Awarded 2 days ago

Victor Comitti

235 bronze badges

Prove that $\int_0^1\frac{\operatorname{Li}_3(1-z)}{\sqrt{z(1-z)}}\mathrm dz=-\frac{\pi^3}{3}\log 2+\frac{4\pi}3\log^3 2+2\pi\zeta(3)$

Awarded 2 days ago

mrtaurho

16.8k14 gold badges36 silver badges85 bronze badges

Is the absolute value of a number divided by zero defined?

Awarded 2 days ago

JabberwokyStrollin

1313 bronze badges

Clarification on Furstenberg's topological "Infinitude of Primes" proof

Awarded 2 days ago

tisPrimeTime

9424 silver badges18 bronze badges

Evaluation of a sum of $(-1)^{k} {n \choose k} {2n-2k \choose n+1}$

Awarded 2 days ago

Wassy Mam

711 silver badge4 bronze badges

how to show that all solutions tend to zero?

Awarded 2 days ago

104078

1,9391 gold badge18 silver badges40 bronze badges

Laminar family (of pairwise distinct non-empty sets) has at most $2n-1$

Awarded 2 days ago

Naani Masi

516 bronze badges

No. of ways of selecting 3 squares when they do not lie in same row, column, or diagonal

Awarded Nov 28 at 2:36

Amadeus

1,1498 silver badges20 bronze badges

Commutativity of weak partial derivatives. Don't follow proof.

Awarded Nov 28 at 2:14

mark

1,7812 gold badges14 silver badges22 bronze badges

Signature of the inner product.

Awarded Nov 28 at 1:42

asdasd asd

4272 silver badges9 bronze badges

Odd prime $p\mid a^{2023}+b^{2023},b^{2024}+c^{2024},c^{2025}+a^{2025}\Rightarrow p\mid a,b,c$

Awarded Nov 28 at 1:09

D S

5,8612 gold badges10 silver badges34 bronze badges

Globally rectify $ \dot x = x^2$

Awarded Nov 27 at 23:51

l196884z

995 bronze badges

Multiplicative group modulo n isomorphism

Awarded Nov 27 at 23:51

edm

5,9101 gold badge16 silver badges37 bronze badges

Dini derivatives and fundamental theorem of calculus

Awarded Nov 27 at 23:38

ℂybernetician

5432 silver badges18 bronze badges

map between classifying spaces

Awarded Nov 27 at 23:38

C. Zhihao

1,4401 gold badge11 silver badges21 bronze badges

Fundamental Lemma of homological Algebra, what is $H_0f$ supposed to mean?

Awarded Nov 27 at 22:54

Zest

2,5461 gold badge12 silver badges22 bronze badges

Winning strategy for a game

Awarded Nov 27 at 22:41

Oshawott

4,0581 gold badge15 silver badges44 bronze badges

About the dimension of intersection of null spaces of linear functions

Awarded Nov 27 at 22:12

azc

1,28110 silver badges20 bronze badges

Prev 1 2

4 5

…

4173 Next