Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

  7. current community

    your communities

    more stack exchange communities

    company blog
Mathematics
Meta User
Network Profile
4,784
reputation
1
7
27

YiFan

Saying hi from Singapore :)

210
answers
34
questions
~29k
people reached
  • Singapore
  • Member for 1 year, 4 months
  • 497 profile views
  • Last seen 15 mins ago

Communities (8)

Top Meta Posts
2
1

Top Network Posts

Top Tags (161)

Score 36
Posts 25
Posts % 10
Score 35
Posts 37
Score 32
Posts 30
Score 28
Posts 14
Score 24
Posts 29
Score 23
Posts 20
View all tags →

Top Posts (244) All Questions Answers | Votes Newest

19 Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with steps of $0.5$ Feb 10
10 Solid Angle Trigonometry? Jan 29 '18
9 Is there a substitution which transforms every Fermat curve into an elliptic curve? Dec 17 '18
8 Almost normal subgroups: Is there any notion which is weaker than normal subgroup? Feb 21
8 Question about proving $\mathbb{Z}[i]$ is not UFD Mar 10
7 Area using $\iint dxdy$ Feb 4
7 Is there a natural group of subgroups of a group? Jan 5
7 Synthetic solution to this geometry problem? Dec 5 '18
7 A continuous curve intersects its 90 degrees rotated copy? Feb 11
7 A pattern in determinants of Fibonacci numbers? Dec 3 '18
View all questions and answers →

Badges (35)

Gold

1

Rarest

Silver

7

Rarest

Bronze

27

Rarest

View all badges →