Organizer - Badge - Mathematics Stack Exchange

Organizer

First retag.

Awarded 7941 times.

Prove: For any simple, connected, planar graph $G$, $e\le 3v-6$

Awarded yesterday

Piita

6341 silver badge11 bronze badges

direct image of lisse sheaves

Awarded yesterday

Thomas Manopulo

1,1813 silver badges15 bronze badges

Can I benefit from directly using analysis textbooks to self-learn calculus, instead of calculus textbooks?

Awarded 2 days ago

user

958 bronze badges

Show that $ \frac{X_{n}}{n} \stackrel{\mathrm{d}}{\longrightarrow} X $ for $ n \rightarrow \infty $

Awarded 2 days ago

nejimban

3,3631 gold badge10 silver badges13 bronze badges

Check my reasoning on two "expected value" problems?

Awarded May 24 at 4:13

xytan0585

7914 bronze badges

Problem calculating a functional

Awarded May 23 at 17:41

Abezhiko

3,7672 silver badges11 bronze badges

Functional equation in $R^n$

Awarded May 22 at 15:07

Wrloord

9721 silver badge12 bronze badges

Determine who has got the winning strategy

Awarded May 21 at 23:10

Richard

5352 silver badges10 bronze badges

Point set topology closure

Awarded May 21 at 15:32

anonymous

3,0097 silver badges18 bronze badges

How two get these two value?

Awarded May 20 at 1:35

Gonçalo

1,5912 silver badges11 bronze badges

Why am I getting a weird number for this question?

Awarded May 18 at 14:11

IraeVid

7610 bronze badges

(post deleted or otherwise unavailable)

Awarded May 16 at 18:43

L0tad

1196 bronze badges

Proof of convergence of $\sum_{n=1}^{\infty} \int_0^{1/n}\frac{\sqrt{x}}{1+x^2} dx$? [duplicate]

Awarded May 16 at 13:56

Utkarsh

1,28616 bronze badges

(post deleted or otherwise unavailable)

Awarded May 15 at 15:55

Godfather

2,2406 silver badges10 bronze badges

An oil-pipe has to connect the oil-well O and the factory F, between which there is a river whose banks are parallel.

Awarded May 13 at 19:42

MichaelMcL1960

5702 silver badges12 bronze badges

Prove that the composition of two group homomorphisms is a group homomorphism.

Awarded May 13 at 16:47

MrUnknown

537 bronze badges

Injective function with a bounded derivative

Awarded May 12 at 18:27

MathFail

15.4k2 gold badges14 silver badges41 bronze badges

Finding the radical of ideal $(y^4-x^2, x^2 - xy^2)$ without using Nullstellensatz

Awarded May 12 at 17:46

Soumik Mukherjee

3111 silver badge11 bronze badges

Possible arrangements of $n$ balls in $n$ boxes [closed]

Awarded May 12 at 5:34

Learningstill

29714 bronze badges

Is this subset of a closed set Borel measurable?

Awarded May 12 at 0:05

Jonathan Schilhan

1,6551 gold badge9 silver badges12 bronze badges

After Round Robin, there is always a player such that every other was either beaten by him or beaten by a player beaten by him

Awarded May 11 at 9:46

Stephen Smith

19310 bronze badges

Best strategy for 6 sided dice game: Roll as many dice as you want, you lose if at least one $1$ appears.

Awarded May 9 at 8:48

Gary Liang

91817 bronze badges

Determining the binary operation from a Cayley Table

Awarded May 8 at 2:18

Connor W

906 bronze badges

(post deleted or otherwise unavailable)

Awarded May 7 at 13:09

tryingtobeastoic

3,1579 silver badges37 bronze badges

Help find hard integrals that evaluate to $59$?

Awarded May 5 at 19:33

Cork Screwdriver

36611 bronze badges

Show that $\lim_{z\to z_0}|f(z)|=\infty$ if and only if $z_0$ is a pole

Awarded May 5 at 16:16

Vrangone

34 bronze badges

Given an equation with x, y, z and a constant, how do I find the center and radius of a sphere?

Awarded May 5 at 1:21

Stephen Nemo

9710 bronze badges

Discrete harmonic functions bounded from below. [duplicate]

Awarded May 3 at 19:56

Arthur

If the median of $X$ is greater than the median of $Y$ then $\Bbb P(X>Y) \geq \frac14$

Awarded May 2 at 11:43

StiftungWarentest

8251 silver badge15 bronze badges

Solving a particular recursion

Awarded May 1 at 17:12

chirpyboat73

856 bronze badges

Finding the inverse of a matrix in terms of other matrices [closed]

Awarded May 1 at 16:42

alien2003

1,0882 silver badges12 bronze badges

Quotient Ring and Ideals proof

Awarded Apr 28 at 5:05

cgb5436

1859 bronze badges

Questions About the Proof of Cauchy–Pompeiu Integral Formula.

Awarded Apr 27 at 18:33

Petra Axolotl

9904 silver badges13 bronze badges

Can $\operatorname{Spec}(R)$ be not homeomorphic to $\operatorname{Spec}(S)$ but be isomorphic as a poset?

Awarded Apr 26 at 16:09

math54321

5122 silver badges8 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 24 at 9:26

Math Attack

In the lottery of 100 tickets, half are winning. How many tickets need to be bought to reach a 0.999 probability of winning?

Awarded Apr 24 at 0:01

user1174038

297 bronze badges

Uniqueness of a constrained system of linear equations

Awarded Apr 23 at 1:55

Jonathan Xu

11510 bronze badges

Solving $\log_2(x+1)+x=2$

Awarded Apr 22 at 8:05

nonuser

4973 silver badges13 bronze badges

Prime divisors of $a^n+b$.

Awarded Apr 21 at 22:40

bb_823

4141 silver badge12 bronze badges

Math Grouping Optimization

Awarded Apr 19 at 16:56

wjmccann

2,82410 silver badges29 bronze badges

Give $2$ matrices $A$ and $B$, that are real, with size $n$($n\ge 2$) and satisfy $AB- nA - B$ = $0$. Show that $AB^{2n} = B^{2n}A$ [closed]

Awarded Apr 19 at 0:20

lunarStarlight

32 bronze badges

A right angle relates to orthocenter and circumcenter

Awarded Apr 18 at 15:07

trequartista

1,35911 silver badges27 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 18 at 6:35

cs89

3,19912 silver badges23 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 16 at 19:33

EDS

5363 silver badges19 bronze badges

Complement of a set and inverse image.

Awarded Apr 16 at 15:12

user123234

2,5405 silver badges17 bronze badges

Expected (maximum minus minimum) of Laplacian random variables

Awarded Apr 16 at 7:56

jvc

2,0744 silver badges15 bronze badges

Is it possible to solve the equation $\nabla_x F(x) = G(x)$ with respect to x, where F is a known scalar field and G is a known vector field?

Awarded Apr 15 at 16:21

yllgl

1157 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 15 at 15:49

apocalyptic

9510 bronze badges

Intuition in choosing finite set of points in proof that Pointwise convergence implies convergence in pointwise topology

Awarded Apr 15 at 8:01

Lexponent

1179 bronze badges

Why ground set of submodular function maximization is finite set?

Awarded Apr 14 at 9:19

aroyc

4151 gold badge4 silver badges16 bronze badges

How to calculate $\int_{0}^{\infty}\frac{x^{2}\ln x}{(1+x^{3})^4}dx$

Awarded Apr 14 at 9:06

Hisham

6012 silver badges14 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 13 at 19:42

CrSb0001

1,1592 silver badges22 bronze badges

Birthday-coverage problem

Awarded Apr 13 at 6:46

ManRow

4152 silver badges14 bronze badges

Proving $1 <\int_0^{2 \pi} \frac{\sin x}{x} d x < \frac{\pi}{2}$

Awarded Apr 13 at 4:56

Jose Jimenez

684 bronze badges

Intuitive reason for why $\operatorname{Spec}(k[x,y,z]/(x-yz))$ is smooth at $O$ while $\operatorname{Spec}(k[x,y,z]/(x^2-yz))$ isn't?

Awarded Apr 12 at 9:00

Aphelli

31.4k1 gold badge19 silver badges47 bronze badges

Approximation of $\sqrt{2}$.

Awarded Apr 11 at 19:32

Chessanator

5,1231 gold badge8 silver badges18 bronze badges

Bayes' Theorem Probability Question

Awarded Apr 11 at 14:18

perepelart

1961 silver badge8 bronze badges

Why do engineers use the Z-transform and mathematicians use generating functions?

Awarded Apr 10 at 11:09

Anonymous

989 bronze badges

$\displaystyle\lim_{n\to\infty} n\log \left(\frac{n+1}{n}\right )$

Awarded Apr 9 at 17:10

Nothing special

4452 silver badges10 bronze badges

Necessary and sufficient condition on a set for a continuous function $f$ to be bounded by the subsets

Awarded Apr 8 at 17:57

Jan Safronov

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