User GNUSupporter 8964民主女神地下教會 - Mathematics Stack Exchange

GNUSupporter 8964民主女神地下教會

Member for 8 years
Last seen this week

16 Questions

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8 votes

4 answers

429 views

An inequality using convex functions: If $\frac{a^2}{1+a^2}+\frac{b^2}{1+b^2}+\frac{c^2}{1+c^2} = 1$ then $abc \le \frac1{2\sqrt 2}$

asked Nov 15, 2015 at 6:41

4 votes

0 answers

198 views

An inequality $\frac{y_1-x_1}{x_2+x_3} + \frac{y_2-x_2}{x_3+x_1} + \frac{y_3-x_3}{x_1+x_2} > 0 \;\forall x_i,y_i>0$

asked Dec 30, 2015 at 10:43

4 votes

2 answers

140 views

How can I use nine-point circle to solve this concyclic problem

asked Jun 6, 2022 at 17:02

3 votes

2 answers

2k views

Upper bound on expected norm of subgaussian random matrix

asked Feb 14, 2019 at 15:13

2 votes

0 answers

214 views

Morawetz's two $L^p$ inequalities

asked Dec 4, 2016 at 23:53

2 votes

1 answer

92 views

Trying to use AM–GM to prove an inequality

asked Dec 28, 2015 at 11:54

1 vote

1 answer

120 views

What is the English name for these two geometric formulae?

asked Apr 27, 2022 at 0:44

1 vote

3 answers

260 views

Given an element in a quotient group $G/H$, find an element with the same order in $G$

asked Dec 28, 2016 at 17:55

1 vote

1 answer

922 views

A complete metric on the space of bounded Lipschitz function

asked Dec 15, 2017 at 20:39

1 vote

1 answer

163 views

Durrett Ex.1.3.16

asked Feb 3, 2018 at 8:28

1 vote

1 answer

80 views

Comparison of a function with its derivative

asked Dec 1, 2015 at 9:23

1 vote

1 answer

1k views

Term-by-term integration of complex power series

asked Dec 22, 2015 at 15:48

1 vote

1 answer

581 views

Unicode notation of Euler Constant [closed]

asked Feb 23, 2019 at 8:48

0 votes

1 answer

2k views

Maximise right circular cone volume with fixed surface area using inequalites

asked Mar 3, 2019 at 9:27

0 votes

1 answer

196 views

A doubt in the proof of Burnside's formula [duplicate]

asked Dec 28, 2016 at 15:26

-1 votes

1 answer

155 views

q-derivative of binomial

asked Mar 21, 2019 at 20:28