User Đào Thanh Oai

2 votes

0 answers

166 views

Pascal theorem for three dimensions

asked Jul 2, 2018 at 9:55

2 votes

0 answers

361 views

An inequality related to Power sum and elementary symmetric polynomial and majorizes

asked Jun 16, 2018 at 16:36

2 votes

1 answer

375 views

Yiu's equilateral triangle-triplet points

asked Jun 27, 2018 at 1:10

2 votes

0 answers

353 views

A generalization of Bernoulli's inequality and what does it application for?

asked Jul 19, 2018 at 2:26

2 votes

1 answer

230 views

Some inequalities on chain of circle packing

asked Jul 19, 2018 at 16:35

2 votes

1 answer

339 views

Is there a constant $\alpha$ such that: $P_{n+1} < P_n.\left(\frac{n+1}{n}\right)^\alpha$?

asked Sep 28, 2019 at 16:02

2 votes

1 answer

367 views

What is the symmetry group of this configuration?

asked Jul 19, 2019 at 15:11

2 votes

1 answer

150 views

Is a generalization of Padoa inequality correct?

asked Jun 19, 2019 at 1:45

2 votes

1 answer

99 views

There is no general method to construct n-regular polygon such that the given n-polygon inscribed the n-regular polygon

asked Jul 21, 2020 at 12:23

2 votes

1 answer

182 views

Is a line associated with antipodal points (the fact, it is the generalization of Simson line) known?

asked Oct 10, 2021 at 10:29

2 votes

0 answers

148 views

Does this theorem on tangential quadrilateral have a name?

asked Oct 30, 2021 at 4:39

2 votes

0 answers

115 views

Another Butterfly theorem — Conway like circle

asked Aug 11 at 11:10

2 votes

0 answers

213 views

A generalization of the Archimedean circle

asked Jun 8, 2023 at 1:49

2 votes

2 answers

245 views

A necessary and sufficient condition for three diagonals of a hexagon to be concurrent

asked Sep 22 at 9:24

2 votes

1 answer

142 views

Does this result above six points follow have a name?

asked Dec 11 at 6:37

1 vote

0 answers

112 views

Is the formula known? and can we generalized for higher dimensions?

asked May 29 at 8:22

1 vote

0 answers

176 views

Four incenters lie on a circle-Does this theorem have a name?

asked Nov 8, 2021 at 16:32

1 vote

0 answers

94 views

A special configuration of Nine Circles Theorem and Eight Circle Theorem

asked May 8, 2023 at 16:40

1 vote

0 answers

151 views

Stronger conjectured inequality for area of a polygon

asked Jul 9, 2022 at 0:20

1 vote

0 answers

84 views

How can construct the equilateral $A''B''C''$ such that area of $A''B''C''$ is biggest

asked Jul 10, 2020 at 16:04

1 vote

1 answer

385 views

Cramer–Castillon problem like

asked May 4, 2021 at 15:08

1 vote

1 answer

352 views

Thirteen-point conic and four-point line, are they new?

asked May 9, 2021 at 9:53

1 vote

1 answer

522 views

A generalization of Lander, Parkin, and Selfridge conjecture

asked Aug 3, 2019 at 15:20

1 vote

1 answer

163 views

How many points appear in the plane when the chain of n-gons is close?

asked Jul 23, 2018 at 14:15

1 vote

1 answer

126 views

Chain rotation of a point

asked Jul 31, 2018 at 15:58

1 vote

0 answers

202 views

Some Problems On Apollonian Gasket

asked Dec 16, 2018 at 11:43

1 vote

1 answer

153 views

Is $P_{2n} \ge 2P_n$ and $\pi(2x) \le 2\pi(x)$ inconsistent to the Prime k-tuple conjecture?

asked Jun 29, 2018 at 6:05

0 votes

0 answers

167 views

Infinity new equilateral triangles in one configuration of triangle plane

asked Dec 20, 2018 at 10:35

0 votes

1 answer

190 views

Is $f(x)$ is more curvature than $g(x)$ then length of $f(x)$ seem longer than length of $g(x)$?

asked Jul 12, 2018 at 18:16

0 votes

2 answers

235 views

An inequality on length of two curves [closed]

asked Jul 13, 2018 at 6:28

Stack Exchange Network

102 Questions

Pascal theorem for three dimensions

An inequality related to Power sum and elementary symmetric polynomial and majorizes

Yiu's equilateral triangle-triplet points

A generalization of Bernoulli's inequality and what does it application for?

Some inequalities on chain of circle packing

Is there a constant $\alpha$ such that: $P_{n+1} < P_n.\left(\frac{n+1}{n}\right)^\alpha$?

What is the symmetry group of this configuration?

Is a generalization of Padoa inequality correct?

There is no general method to construct n-regular polygon such that the given n-polygon inscribed the n-regular polygon

Is a line associated with antipodal points (the fact, it is the generalization of Simson line) known?

Does this theorem on tangential quadrilateral have a name?

Another Butterfly theorem — Conway like circle

A generalization of the Archimedean circle

A necessary and sufficient condition for three diagonals of a hexagon to be concurrent

Does this result above six points follow have a name?

Is the formula known? and can we generalized for higher dimensions?

Four incenters lie on a circle-Does this theorem have a name?

A special configuration of Nine Circles Theorem and Eight Circle Theorem

Stronger conjectured inequality for area of a polygon

How can construct the equilateral $A''B''C''$ such that area of $A''B''C''$ is biggest

Cramer–Castillon problem like

Thirteen-point conic and four-point line, are they new?

A generalization of Lander, Parkin, and Selfridge conjecture

How many points appear in the plane when the chain of n-gons is close?

Chain rotation of a point

Some Problems On Apollonian Gasket

Is $P_{2n} \ge 2P_n$ and $\pi(2x) \le 2\pi(x)$ inconsistent to the Prime k-tuple conjecture?

Infinity new equilateral triangles in one configuration of triangle plane

Is $f(x)$ is more curvature than $g(x)$ then length of $f(x)$ seem longer than length of $g(x)$?

An inequality on length of two curves [closed]