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Mathematics
Quý Nhân Đặng Hoàng's user avatar
Quý Nhân Đặng Hoàng's user avatar
Quý Nhân Đặng Hoàng's user avatar
Quý Nhân Đặng Hoàng
  • Member for 2 years, 11 months
  • Last seen this week
  • Vietnam
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A student who loves maths

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9
Minimize $\frac{1}{2}\sum_{k=1}^m (x_{k+1}-x_{k})^2$
Feb 20
6
Catalan constant's integral representation
Aug 8, 2021
6
Minimize travel time of a group of people with a motorbike
Jul 5
5
(Dis)Proving $\lim_{x\to\infty}\frac1{x^s}\int_0^xt^{s-1}f(\sin t)dt=\frac1{2\pi s}\int_0^{2\pi}f(\sin t)dt$, for $s>0$ and $f$ defined on $[-1,1]$
Feb 7, 2023
3
New identities involving infinite summation of trigonometric functions?
Jul 28, 2021
3
When to apply l'Hôpital rule?
Sep 8, 2021
2
Conjecturing a general formula to solve limit-integral questions
Feb 9, 2023
1
Method for solving "Iterated" functional equation
Jan 8, 2023
1
(Im)possibility of closed-form expression of Clausen functions
Jun 30
1
Minimize $\frac{1}{2}\sum_{k=1}^m (x_{k+1}-x_{k})^2$
Feb 23