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Mathematics
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sirous
  • Member for 9 years, 9 months
  • Last seen this week
  • Tehran iran
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I am a retired engineer interested in mathematics especially in number theory and geometry.Mathematics is best to activate your brain and satisfy your curiosity.

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12
Sum of series : $1+11+111+...$
Sep 29, 2016
10
Can we prove this conjecture related to the trisection of the angle?
Sep 5
9
How do you solve a system of quadratic equations?
Feb 17, 2017
8
Geometry problem: square and golden ratio
Jun 30
7
Prove $\sum_{n=1}^{\infty} \arctan\left(\frac{1}{F_n}\right) \arctan\left(\frac{1}{F_{n+1}}\right)=\frac{\pi^2}{8}$
Apr 4, 2021
7
Is there a square with all corner points on the spiral $r=k\theta$, $0 \leq \theta \leq \infty$?
Jul 20, 2021
6
Find a synthetic proof to an old problem .
11 hours ago
6
Will a circle projected onto a cylinder be an ellipse?
Jan 16, 2022
6
Does equation $a^m+b^n =c^{m+n}$ have integral solutions?
Jul 27, 2023
6
How to evaluate $\int_{\pi/2}^\pi \sqrt{1 - \frac{1}{2}\cos^2 x + \sin x \sin 2x} \;\mathrm{d}x$
Oct 9, 2018