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YiFan

Singapore

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90
Asserting that Atheism and Theism are both faith based positions
philosophy.stackexchange.com

20
Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$
math.stackexchange.com

15
Are all notation equal by derivatives?
math.stackexchange.com

14
Unsolved Problems (Not Independent of ZFC) due to Lack of Computational Power
math.stackexchange.com

14
Why do early math courses focus on the cross sections of a cone and not on other 3D objects?
math.stackexchange.com

8
Showing $f(t) = t^4 + 2t^2 + 9$ is reducible over $\Bbb Q$
math.stackexchange.com

8
Almost normal subgroups: Is there any notion which is weaker than normal subgroup?
math.stackexchange.com

8
Question about proving $\mathbb{Z}[i]$ is not UFD
math.stackexchange.com

7
A pattern in determinants of Fibonacci numbers?
math.stackexchange.com

7
Area using $\iint dxdy$
math.stackexchange.com

6
Is $x+y -\pi$ an algebraic expression or not?
math.stackexchange.com

6
How to solve $\sin^2(x)+\sin2x+2\cos^2(x)=0$
math.stackexchange.com

6
$x^2 + y^2+xy = 1$ , then find the minimum of $x^3 y + xy^3 +4$
math.stackexchange.com

5
Alternate definition of prime numbers
math.stackexchange.com

5
If $Q$ is a proper orthogonal transformation matrix, deduce that $\det(1-Q)=0$.
math.stackexchange.com

5
Compute $\int \sin(x) \left( \frac{1}{\cos(x) + \sin(x)} + \frac{1}{\cos(x) - \sin(x)} \right)\,dx.$
math.stackexchange.com

5
Infinite Integration using the ceiling function
math.stackexchange.com

5
Intersection of $\{2^a 3^b 5^c7^d\}$with its translates
math.stackexchange.com

5
Can $3^x=2y^2-1$ be solved over the natural numbers?
math.stackexchange.com