An interesting infinite sum
17:13
Finding the closed form for a double factorial sum
16:02
An integral with many logs
11:46
An infinite cosine sum.
20:21
A differential equation from the famous Putnam exam.
10:44
an interesting integral
17:26
Araştırmacılar bunun bir hata olduğunu düşündüler (Borwein integralleri)
16:21
Things get weird at infinity
3:15:53