the most famous Ramanujan sum 1+2+3+...=-1/12
41:44
Numberphile v. Math: the truth about 1+2+3+...=-1/12
22:27
a spectacular solution to the Basel problem (sum of 1/n^2 via a complex integral)
8:57
Making Sense of Ramanujan's Infinite Sum for General Audience.
17:17
Ramanujan's infinite root and its crazy cousins
13:48
How To Learn Any Skill So Fast It Feels Illegal
15:17
Why -1/12 is a gold nugget
5:26
Not -1/12
16:58