Top network posts

• 84 What function can be differentiated twice, but not 3 times?
• 60 Closed Form for $~\int_0^1\frac{\text{arctanh }x}{\tan\left(\frac\pi2~x\right)}~dx$
• 58 Interesting and unexpected applications of $\pi$
• 53 Does $\lfloor \sqrt{p} \rfloor$ generate all natural numbers?
• 46 Why is a rectangle a parallelogram, but a parallelogram is not a rectangle?
• 45 How can I write the numbers 5 and 7 as some sequence of operations on three 9s?
• 42 What exactly IS a square root?
• View more network posts →