Organizer - Badge - Mathematics Stack Exchange

Organizer

First retag.

Awarded 8438 times.

Question about an application of Hopf-Rinow Theorem

Awarded 3 hours ago

M.G.

1,26111 silver badges21 bronze badges

Evaluating $4^{5 \log_{4\sqrt{2}} (3-\sqrt{6}) - 6\log_{8} (\sqrt{3} - \sqrt{2})}$

Awarded 17 hours ago

Nishant Kalonia

34515 bronze badges

Combining 3 equations into one single equation [closed]

Awarded May 6 at 21:33

Debalanced

54812 bronze badges

Euler characteristic of torus

Awarded May 6 at 4:10

James Pagan

907 bronze badges

(post deleted or otherwise unavailable)

Awarded May 1 at 2:20

paperrida

479 bronze badges

Let $a_1,a_2,\ldots,a_{100}$ be real numbers,each less than one,satisfy $a_1+a_2+\ldots+a_{100} >1$.

Awarded Apr 14 at 5:47

Neelabh Shome

257 bronze badges

Differential Forms Notation -- A simple question

Awarded Apr 12 at 17:06

Soumil Mitra

689 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 12 at 13:32

Hamdiken

1,5198 silver badges16 bronze badges

Find $a,b$ when $2^\frac{2a+2}{b}=125; 5^\frac{b}{a}=4$

Awarded Apr 11 at 4:23

curiousguy

911 silver badge10 bronze badges

Curvature forms of a connection that is compatible with a $G$-invariant metric is also $G$-invariant

Awarded Apr 11 at 1:56

Diana Pestana

1,3493 silver badges17 bronze badges

Szekeres proof that given any subspace, a complementary subspace always exists

Awarded Apr 10 at 13:06

Leobeth

9942 silver badges8 bronze badges

(post deleted or otherwise unavailable)

Awarded Apr 10 at 11:11

Anuradha Banthia

7301 silver badge10 bronze badges

Prove that there is a circle inscribed in the quadrilateral $QCMD$.

Awarded Apr 7 at 17:07

Luv Gupta

1,0194 silver badges23 bronze badges

Mathematical Logic: Good New/Classic Reference [closed]

Awarded Apr 7 at 9:20

psl2Z

5,3537 silver badges22 bronze badges

Fundamental group of 2-fold projective plane and Klein bottle

Awarded Apr 5 at 4:58

Dwaipayan Sharma

7749 bronze badges

Global section and Smooth vector fields

Awarded Apr 3 at 22:03

Talha Ahmed

1717 bronze badges

The number of ways to pair 2n players in a tennis tournament

Awarded Apr 3 at 16:12

powerline

9934 silver badges24 bronze badges

A possible way to introduce imaginaries

Awarded Mar 31 at 14:06

Rick Z

718 bronze badges

Domain of quotient of quadratics with one common root

Awarded Mar 30 at 21:56

Bachelor

1,0801 silver badge16 bronze badges

Let $a, b, n$ and $m$ be positive integers, with $n > 1$. Show that $a^n + b^n = 2^m$ implies $a = b$ [closed]

Awarded Mar 30 at 9:47

Zoudelong

1,3345 silver badges14 bronze badges

Existence of the solution of a linear parabolic pde

Awarded Mar 28 at 8:06

l'étudiant

3311 silver badge11 bronze badges

Is every locally convex distinguished space an H-space?

Awarded Mar 28 at 4:40

R. H. Vellstra

3,2438 silver badges34 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 27 at 19:57

DAVID CHEDESTER

3310 bronze badges

How to compute $\int_0^1\frac{\text{Li}_2(x^2)\arcsin^2(x)}{x}dx$ or $\sum_{n=1}^\infty\frac{4^nH_n}{n^4{2n\choose n}}$

Awarded Mar 24 at 19:31

Jorge Layja

3,91424 silver badges34 bronze badges

How do we solve this insanely sane sequence question?

Awarded Mar 23 at 12:42

User1305275

1,2962 silver badges20 bronze badges

Find a complete sufficient statistics, or show that one does not exist.

Awarded Mar 21 at 7:10

AVISHEK GHORAI

34 bronze badges

If $f$ is entire and $f(z)\to \infty$, for $z\to \infty$ , then $f(z)$ is polynomial

Awarded Mar 17 at 9:30

Pro_blem_finder

31012 bronze badges

Integral $\int \frac{\mathrm d x}{1+x^4}$ by partial fractions and complex valued logarithms; converting back to real functions

Awarded Mar 15 at 14:39

Poonguzhali Annadurai

90120 bronze badges

Prove that for all $x$ where $0<x<\pi/2$, $\sin x+\cos x>1$ [closed]

Awarded Mar 14 at 22:42

Fmbalbuena

1756 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 7 at 15:30

chirico

1,3471 gold badge3 silver badges15 bronze badges

Determinants of certain Hankel matrices

Awarded Mar 6 at 22:47

Le p'tit bonhomme

4883 silver badges9 bronze badges

Can a positive real number $a$ be written as $x \lfloor x \rfloor \{x\}+x$?

Awarded Mar 6 at 12:06

Myungheon Lee

1,5614 silver badges18 bronze badges

Is the sequence $\{(-1)^n/n\}$ divergent or convergent?

Awarded Mar 6 at 5:33

Kyle

5852 silver badges13 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 5 at 7:17

Kirusanth

6465 silver badges12 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 5 at 6:55

Random Math Enthusiast

2,8706 silver badges27 bronze badges

Proving $\frac{1}{ab+ac+2bc}+\frac{1}{bc+ba+2ca}+\frac{1}{ca+cb+2ab}\ge \frac{15}{4ab+4bc+4ca+8}$ when $a+b+c+abc=4.$ [closed]

Awarded Mar 5 at 6:43

Fetray

941 silver badge19 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 5 at 3:22

user1515097

3519 bronze badges

Is displacement the change in position between two points or is it the position relative to the origin?

Awarded Mar 3 at 12:41

Michael T

1,4291 silver badge22 bronze badges

A contradiction with a unique proof for the second equation of motion using triangles

Awarded Mar 3 at 2:06

Bruno Andrades

2,8301 gold badge9 silver badges20 bronze badges

(post deleted or otherwise unavailable)

Awarded Mar 2 at 11:05

Iq-n-dI

1,0246 silver badges13 bronze badges

Complex numbers and why $i^3$ cant equal $(i^2)^{(\frac{3}{2})}$ [duplicate]

Awarded Feb 27 at 7:41

ThankYouForFlyingRyanair

46719 bronze badges

Solutions for the Linear Constant Coefficient Difference Equations [closed]

Awarded Feb 23 at 9:32

Gribouillis

16.3k1 gold badge16 silver badges30 bronze badges

(post deleted or otherwise unavailable)

Awarded Feb 21 at 15:08

youthdoo

2,6804 silver badges21 bronze badges

Growth of the d- sequence of a semigroup can not be strictly between linear and exponential (second part more & more questions)

Awarded Feb 18 at 10:26

Dream

178 bronze badges

Natural numbers of infinite length in Cantor's diagonal argument [duplicate]

Awarded Feb 16 at 21:56

altwoa

1,3683 silver badges15 bronze badges

(post deleted or otherwise unavailable)

Awarded Feb 15 at 21:08

Tijil Saka

15810 bronze badges

How to prove that this complex system of trigonometric equations has no common solution?

Awarded Feb 15 at 15:52

Zhengyang Tang

31 bronze badge

Realness of roots of $\Phi(x) = \sum_{k=0}^{n} \frac{f^{(k)}(x)}{2^{k}}$ imply realness of roots of $f(x)$

Awarded Feb 14 at 14:47

whiltab

3401 silver badge8 bronze badges

Counting lattice paths without 3 consecutive ups

Awarded Feb 13 at 22:37

Keith Kearnes

14.9k1 gold badge22 silver badges46 bronze badges

Area of $\triangle OHC$, in the isosceles triangle with $75^\circ, 75^\circ, 30^\circ$ angles.

Awarded Feb 13 at 22:08

FishDrowned

1,0293 silver badges19 bronze badges

(post deleted or otherwise unavailable)

Awarded Feb 13 at 11:28

Toph

1,1947 silver badges15 bronze badges

About $\pi(kx) < k\pi(x)$

Awarded Feb 8 at 18:54

Luca Armstrong

1,3041 gold badge4 silver badges13 bronze badges

Classical Solution to the Heat Equation with a Drift Term [closed]

Awarded Feb 8 at 16:02

secretGarden

17113 bronze badges

What is the problem with the proof of $|z_1 - z_2| \le |z_1| - |z_2|$? [closed]

Awarded Feb 7 at 19:18

Ved Patel

6233 silver badges21 bronze badges

In a certain city three car brands, $A, B, C$ have... Is my solution correct?

Awarded Feb 5 at 8:09

Ak3.14

3474 silver badges14 bronze badges

Evaluate $\int_{-\frac{1}{3}}^{1}\left(\sqrt[3]{1+\sqrt{1-x^{3}}}+\sqrt[3]{1-\sqrt{1-x^{3}}}\right)dx$

Awarded Feb 4 at 23:06

Antony Theo.

4,6664 gold badges7 silver badges37 bronze badges

(post deleted or otherwise unavailable)

Awarded Feb 4 at 8:20

ClemensB

7071 silver badge15 bronze badges

Union of arbitrary neighborhoods of rational numbers

Awarded Feb 2 at 22:52

Pink lake

1457 bronze badges

Analytical Geometry : Formula for In-centre of A Triangle in coordinate geometry [duplicate]

Awarded Feb 2 at 6:32

FKcosθ

6011 silver badge14 bronze badges

How can I cut an irregular part of a quarter circle in exactly two halves?

Awarded Jan 31 at 15:27

Mengchun Zhang

2,99511 silver badges15 bronze badges

2 3 4 5

…

141 Next