User:Wikitime1/sandbox

I sometimes have mood swings. They're unpredictable. I can put education in, which I'll do on future days.

1+2+3+4+...
The series 1+2+3+4+... is divergent. The sum, paradoxically, is -1/12.

ZFR
In zeta function regularization, you use the zeta function. ξ(-1)=-3ἣ(-1)=-1/12.

Ramanujan summation
Ramanujan summation also gives -1/12. It is very complicated, so it won't be covered.

Next up
Grandi's series! Yay!