Famous Question - Badge - Mathematics Stack Exchange

Famous Question

Question with 10,000 views. This badge can be awarded multiple times.

Awarded 17062 times.

The Inverse of a Fourth Order Tensor

Awarded 3 hours ago

Hosein Rahnama

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proof about clique number, adjacency number, and chromatic number

Awarded 8 hours ago

Ali

2272 gold badges5 silver badges12 bronze badges

Sum of powers of 2 from 1 to log(N).

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nhs

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Units of $M_2(Z)$

Awarded 15 hours ago

WWright

5,3506 gold badges31 silver badges34 bronze badges

How is $2^{\log_4 n}= n^{\log _42}$?

Awarded 18 hours ago

shinzou

3,9315 gold badges27 silver badges53 bronze badges

Automorphism of the Field of rational functions

Awarded 18 hours ago

Nana

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What is a good book to study classical projective geometry for the reader familiar with algebraic geometry?

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Rodrigo

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What does arg min max mean?

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Ben

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Proving that the unities of a ring form a group under multiplication

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Andrew Thompson

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Why does the absolute value disappear when taking $e^{\ln|x|}$

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fYre

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Prove that angle bisectors of a triangle are concurrent using vectors

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Aditya Dev

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$f$ is Continuous if and only if its Graph is Closed in $X \times Y$

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user193319

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Strang's proof of SVD and intuition behind matrices $U$ and $V$

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samlaf

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How do I prove double negation elimination in a propositional logic axiom system?

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James

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Are there any tricks to remembering proofs of mathematical theorems?

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RonaldB

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Product of measurable functions is measurable

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user416936

4902 gold badges5 silver badges15 bronze badges

CW complex structure of the projective space $\mathbb{RP}^n$

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Tom

1,0752 gold badges11 silver badges20 bronze badges

Prove that any polynomial function is continuous

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007resu

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Help with using Euler’s formula to prove that $\cos^2(\theta) = \frac{\cos(2\theta)+1}{2}$

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Adam

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connected manifolds are path connected

Awarded Mar 25 at 3:55

pooya

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maclaurin series of $f(x)=xe^{-x}$

Awarded Mar 25 at 2:51

super95

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How many solutions are there to the inequality $x_1 + x_2 + x_3 \le 11$ where $x_1,x_2,x_3$ are nonnegative integers?

Awarded Mar 25 at 2:26

Hazem Alabiad

1932 gold badges2 silver badges14 bronze badges

Rectangular parallelepiped of greatest volume for a given surface area S

Awarded Mar 25 at 2:15

Sitanshu

1471 gold badge2 silver badges12 bronze badges

What is the "Donkey Theorem"?

Awarded Mar 25 at 1:51

Mehper C. Palavuzlar

2,0565 gold badges23 silver badges21 bronze badges

How do I prove that the ceiling of the floor of x is equal to the floor of x?

Awarded Mar 24 at 23:58

knowledge_is_power

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How to define linear and non-linear differential equation

Awarded Mar 24 at 21:16

Forina Fore

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A quick way to generate 3x3 matrices with determinant equal to 1?

Awarded Mar 24 at 19:06

APGreaves

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Given every horse's probability of winning a race, what is the probability that a specific horse will finish 2nd and 3rd?

Awarded Mar 24 at 17:21

Jason

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Normal to a cylinder in cartesian coordinates

Awarded Mar 24 at 10:03

Sandesh

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What is a proper function? [closed]

Awarded Mar 24 at 7:35

winston

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Is there a planar graph calculator?

Awarded Mar 24 at 3:16

kek

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How to type logarithmic functions into Desmos graphing calculator?

Awarded Mar 24 at 1:51

brilliant

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Total Time a ball bounces for from a height of 8 feet and rebounds to a height 5/8

Awarded Mar 23 at 22:31

Rohit Tigga

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If $f: \mathbb Q\to \mathbb Q$ is a homomorphism, prove that $f(x)=0$ for all $x\in\mathbb Q$ or $f(x)=x$ for all $x$ in $\mathbb Q$.

Awarded Mar 23 at 21:22

Mirna

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If the limit of a sequence equals infinity as $n$ approaches infinity does the sequence diverge?

Awarded Mar 23 at 18:50

Sedumjoy

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Application of the pigeon hole principle

Awarded Mar 23 at 17:40

Chad

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Is there a systematic way of finding the matrix of a quadratic form? [duplicate]

Awarded Mar 23 at 15:26

user3133165

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Isometric embedding

Awarded Mar 23 at 15:26

WhitAngl

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How to find curves of intersection between two surfaces

Awarded Mar 23 at 9:33

user42912

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How would I answer the following question about the determinant of a matrix?

Awarded Mar 23 at 8:36

Dev SR

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Given a matrix $B$, what is $det(B^4)$?

Awarded Mar 23 at 1:08

Thomas

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Find the maxima and minima of function with discontinuities

Awarded Mar 22 at 21:51

Mark Read

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What is a resolvent of an operator?

Awarded Mar 22 at 21:35

Konstantin

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Showing $(C[0,1], d_1)$ is not a complete metric space

Awarded Mar 22 at 19:18

Srijan

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Inverse of symmetric matrix plus identity matrix

Awarded Mar 22 at 17:36

TheDon

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How can I resolve $\sum_{x=0}^{\infty} xe^{-x/\theta}$? [duplicate]

Awarded Mar 22 at 15:17

srodriguex

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If $AB$ and $BA$ are defined, then $AB$ and $BA$ are square matrices.

Awarded Mar 22 at 14:25

Decaf-Math

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$\cos^2 \alpha + \cos^2 \beta + \cos^2 \gamma =1$ [duplicate]

Awarded Mar 22 at 9:03

JBach

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Invariant Factors vs. Elementary Divisors

Awarded Mar 22 at 6:17

Eleven-Eleven

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Degrees of Freedom in Affine Transformation and Homogeneous Transformation

Awarded Mar 22 at 3:49

skr

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Prove by induction: $2^n = C(n,0) + C(n,1) + \cdots + C(n,n)$ [duplicate]

Awarded Mar 22 at 3:49

Jason Curt

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Proof that the sum of two independent exponential random variables with same parameter is gamma with $\alpha=2$

Awarded Mar 22 at 3:10

Alex

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Sum of all solutions

Awarded Mar 22 at 1:21

kenobe

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In how many ways may 8 people form a circle for a folk dance?

Awarded Mar 22 at 0:32

LinePlay

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Area inside outer curve of limacon $r=1+2\cos\theta$

Awarded Mar 21 at 14:51

Donald

1951 gold badge1 silver badge7 bronze badges

Evaluate $\oint_{C}(y-\sin x)dx+\cos x dy$

Awarded Mar 21 at 14:51

3SAT

7,4424 gold badges26 silver badges44 bronze badges

Cosets of S3 and Permutations

Awarded Mar 21 at 10:17

gegu

1,6642 gold badges16 silver badges36 bronze badges

Proof of the L'Hôpital Rule for $\frac{\infty}{\infty}$

Awarded Mar 21 at 9:22

SomeoneContinuous

3291 gold badge3 silver badges8 bronze badges

Knight and Knaves logic problem

Awarded Mar 21 at 5:33

Filip Markoski

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The Cantor ternary set is totally disconnected

Awarded Mar 21 at 1:12

Alti

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