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Đào Thanh Oai's user avatar
Đào Thanh Oai's user avatar
Đào Thanh Oai's user avatar
Đào Thanh Oai
  • Member for 6 years, 3 months
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18
An ellipse through 12 points related to Golden ratio
Jun 24, 2018
17
Is every odd positive integer of the form $P_{n+m}-P_n-P_m$?
Jun 28, 2018
13
Is it a new discovery on conic section?
May 8, 2021
12
Can four integer numbers $x$, $y$, $x-y$, $x+y$ be powerful numbers where $\gcd(x,y)=1$?
2 days ago
11
Does this geometry theorem have a name?
Jul 5, 2018
11
An open triangle problem in plane geometry
Nov 14, 2021
11
Do two new special points in any triangle exist?
Sep 30, 2018
10
Is new $n$-conjecture as follows correct?
Jul 7, 2020
9
Strengthened version of Isoperimetric inequality with n-polygon
Apr 30, 2018
9
Is the conjecture A+B=C following correct?
Jun 19, 2018