Self-Learner - Badge - Mathematics Stack Exchange

Self-Learner

Answer your own question with score of 3 or more.

Awarded 3894 times.

Integrals of elliptic integrals.

Awarded 10 hours ago

User

40715 bronze badges

Integrating $\int_0^1 \cos(x+\cos x) dx$

Awarded 14 hours ago

PearApple

717 bronze badges

using markov chains to solve a project-euler problem?

Awarded 2 days ago

thkang

2512 silver badges7 bronze badges

General form of a double integral

Awarded Sep 24 at 17:16

Aaron Lee

2859 bronze badges

"Adding one dimension" to an infinite dimensional topological vector space

Awarded Sep 22 at 7:15

Junyan Xu

6685 silver badges14 bronze badges

Simplified expression for centers of period-three Mandlebrot bulbs

Awarded Sep 21 at 22:48

Lawton

1,2176 silver badges15 bronze badges

Convergence in Skorokhod topology implies convergence in $L^1$.

Awarded Sep 20 at 18:05

Brazilian Cérebro

5703 silver badges17 bronze badges

Convergence of $\sum_{n=1}^\infty(-1)^n\frac{\sqrt[n]{n!}}{n^2}$

Awarded Sep 20 at 5:57

summingsummer

614 bronze badges

Homogeneity of Topological Manifolds: Are they all quotients of topological groups?

Awarded Sep 19 at 5:56

Daniel Grimmer

4711 silver badge10 bronze badges

How does this Markov chain behave?

Awarded Sep 16 at 20:19

Riemann

5902 silver badges15 bronze badges

Series of sine functions

Awarded Sep 15 at 18:43

Martin Pribyl

16310 bronze badges

Explicit Matrix Form of the Time-Evolution Operator

Awarded Sep 13 at 19:07

B Delamera

1731 silver badge8 bronze badges

Rudin example 7.20: $\int_0^{2\pi} (\sin(nx)-\sin(mx))^2dx=2\pi, \space \forall n<m$

Awarded Sep 13 at 15:08

Mathononymous

856 bronze badges

Normal and principal curvature

Awarded Sep 12 at 22:22

Lays

1,9632 gold badges21 silver badges33 bronze badges

$so(4)=su(2)× su(2)$

Awarded Sep 10 at 10:56

student

2802 silver badges10 bronze badges

Path connected compact set with given property

Awarded Sep 7 at 6:50

IntegrateThis

3,7381 gold badge21 silver badges64 bronze badges

$\Vert A \Vert_{G_1} \overset{?}{\geq} \Vert A \Vert_{G_2}$, if $G_1 \succeq G_2 \succeq 0 $

Awarded Sep 6 at 22:01

ujepi

836 bronze badges

Expected hitting times for simple random walk on a hypercube

Awarded Sep 5 at 12:02

Benjamin Wang

2,8782 gold badges14 silver badges32 bronze badges

Newton-Rhapson method on general strongly convex functions

Awarded Sep 5 at 3:16

R. W. Prado

6737 silver badges18 bronze badges

Continuous Lattices - Confusing passage in Dana Scott's paper

Awarded Sep 4 at 11:11

Patrick Nicodemus

1,2156 silver badges17 bronze badges

What is the formula for the parameters of an ellipse based on the linear transformation of a triangle containing it?

Awarded Sep 2 at 22:34

nben

2941 silver badge12 bronze badges

Awarded Sep 2 at 17:05

Mats Granvik

7,2843 gold badges34 silver badges66 bronze badges

Looking for GF(16), GF(32) ... GF (256) tables

Awarded Sep 2 at 10:40

me2

711 gold badge1 silver badge4 bronze badges

Rolling 2 dice probability

Awarded Sep 1 at 4:36

Daniel Geyfman

Norm of covariant derivative via Riemannian metric

Awarded Aug 31 at 19:18

Pengin

3302 silver badges9 bronze badges

Show that if $G$ is a cyclic group of order $n$ and $d\mid n$, then $G$ has a subgroup of order $d$.

Awarded Aug 30 at 3:50

user20194358

75110 bronze badges

Finding solution of non-homogeneous ODE when we know the solutions of the homogeneous counterpart

Awarded Aug 29 at 23:55

S.S

1,1299 silver badges23 bronze badges

Trouble in Proving the Sequential Criterion for Limits at Infinity

Awarded Aug 26 at 16:21

Thomas Finley

1,8632 silver badges18 bronze badges

Distribution of Primitive Pythagorean Triples (PPT) and of solutions of $A^4+B^4+C^4=D^4$

Awarded Aug 26 at 14:40

sixtytrees

3272 silver badges11 bronze badges

Adjoint of a Densely Defined Unbounded Operator is Unique

Awarded Aug 25 at 16:10

Daniel Waters

4802 silver badges10 bronze badges

Suppose $f(t) = f(-t)$ and $f \in C^\infty$, show that there's a $h(t) \in C^\infty$ with $h(t^2) = f(t)$

Awarded Aug 25 at 6:18

Ecotistician

1,0267 silver badges18 bronze badges

Verify the rarefaction wave solution of a general convex scalar problem

Awarded Aug 24 at 12:36

nwsteg

3191 silver badge9 bronze badges

Prove that $\dfrac{\pi^2}{16}=\dfrac{1}{2.2!}+\dfrac{3}{3.3!}+\dfrac{5}{3.4!}+\dfrac{8}{3.5!}+\cdots$

Awarded Aug 23 at 17:02

SoapEatr

4411 silver badge11 bronze badges

Soft question: Which topological properties are transferred by bijective continuous maps?

Awarded Aug 22 at 17:05

John Hughes

91.4k4 gold badges74 silver badges144 bronze badges

Asymptotics of $\displaystyle{\sum_{i=0}^n\sqrt{i(n-i)}}$ as $n\to\infty$

Awarded Aug 22 at 4:42

bob

2,0221 gold badge2 silver badges20 bronze badges

How to check if point $x \in \mathbb{R}^n$ is in a $n$-simplex?

Awarded Aug 21 at 12:21

niekas

2331 silver badge11 bronze badges

Evaluating $\sum_{n=2}^\infty\frac{({2}^{n})(n-1)(n!)}{(2n)!}$

Awarded Aug 19 at 17:50

Vedant Lohan

696 bronze badges

What sums of roots of unity can be expressed "simply"?

Awarded Aug 18 at 20:47

L. E.

3999 bronze badges

Tensor Product Of $L^p$ Spaces Is Dense In The Product $L^p$ Space

Awarded Aug 17 at 18:06

jd27

1,1271 gold badge3 silver badges11 bronze badges

The last group of order $32$

Awarded Aug 17 at 14:56

Thomas

5731 gold badge4 silver badges16 bronze badges

Find the least positive integer $n$ for which $n^5+3$, $(n+1)^5+3$ cease to be coprimes

Awarded Aug 13 at 23:35

KonKan

7,2852 gold badges26 silver badges48 bronze badges

Is there a pure geometric solution to this problem?

Awarded Aug 13 at 8:18

pirsquare

7211 gold badge6 silver badges22 bronze badges

Let $\zeta_p$ be a primitive $p$-th root of unity, and $f\in\Bbb Z[X]$. If $|f(\zeta_p)|=1,$ is $f(\zeta_p)$ a root of unity?

Awarded Aug 13 at 6:19

inversion

915 bronze badges

How to plot tropical varieties?

Awarded Aug 11 at 15:31

ThLD

1019 bronze badges

Continuity of Lebesgue integral

Awarded Aug 10 at 11:37

keepfrog

5292 silver badges12 bronze badges

A difficult minimum

Awarded Aug 8 at 21:32

Pesilk

1216 bronze badges

Showing inequality about number of vertices with ceratin degree for planar graphs

Awarded Aug 8 at 11:48

Raoul Luqué

5831 gold badge2 silver badges17 bronze badges

Sphere's surface area element using differential forms

Awarded Aug 8 at 0:43

Cryo

7683 silver badges13 bronze badges

I have been integrating differential equations for many, many years. How should I justify a certain step in the process though?

Awarded Aug 6 at 23:22

user151522

4473 silver badges11 bronze badges

Sectional curvature independent of basis.

Awarded Aug 6 at 15:48

Ben123

4493 silver badges8 bronze badges

Prove that: $\frac{1}{ka+b}+\frac{1}{kb+c}+\frac{1}{kc+a}\ge\frac{6}{(k+1)\sqrt[3]{(a+b)(b+c)(c+a)}}$

Awarded Aug 6 at 13:10

Inequality

2993 silver badges12 bronze badges

If $ab+bc+ca=1,$ prove $1+36(abc)^2\ge\frac{21abc}{a+b+c}. $

Awarded Aug 5 at 10:04

TATA box

1,0175 silver badges18 bronze badges

Sylow $p$-subgroup and Sylow $q$-subgroup both normal

Awarded Aug 4 at 12:20

Waaal

1871 silver badge10 bronze badges

Problem about square permutation

Awarded Aug 3 at 19:41

Ta Thanh Dinh

3131 silver badge8 bronze badges

Taylor's theorem with remainder of fractional order?

Awarded Jul 31 at 1:28

Stefan Hante

2,59614 silver badges27 bronze badges

If the magnitude of a root of an irreducible polynomial can be expressed via radicals, can the root?

Awarded Jul 30 at 22:41

Sam Forster

1,2526 silver badges11 bronze badges

How to prove: $ab+bc+ca+\sqrt[3]{abc}+20\ge 2\sum_{cyc}\sqrt{a(4a+ab+bc+ca)}$ if $a+b+c=5$

Awarded Jul 28 at 11:49

Trần Nk Trang

42912 bronze badges

$ax^3+bx^2+cx+d=0$ with coefficient $a>b>c>d>0$. Show that the magnitude of all its roots is less than $1$.

Awarded Jul 28 at 1:42

余志祥

3411 silver badge9 bronze badges

Evaluate $\sum\limits_{n=1}^\infty \left(\frac{1}{(k+n)^2+n^2}-\frac{1}{(k+1-n)^2+n^2}\right)$

Awarded Jul 25 at 16:58

Zima

2,6563 silver badges21 bronze badges

Are the eigenvalues of a matrix and just its diagonal related?

Awarded Jul 25 at 9:55

Undertherainbow

7002 gold badges9 silver badges25 bronze badges

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