# Ramanujan summation: How does 1+2+3+4... = -1/12?

**URL:** <https://boards.straightdope.com/t/ramanujan-summation-how-does-1-2-3-4-1-12/986903>\
**Category:** Factual Questions\
**Created:** [July 11, 2023, 4:14pm UTC](https://boards.straightdope.com/t/ramanujan-summation-how-does-1-2-3-4-1-12/986903 "2023-07-11T16:14:07Z")\
**Posts on this page:** 1\
**Showing post:** 48

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**Author:** ![EnolaStraight](https://avatars.discourse-cdn.com/v4/letter/e/41988e/32.png) [@EnolaStraight](https://boards.straightdope.com/u/EnolaStraight)\
**Post date:** [July 11, 2023, 11:39pm UTC](https://boards.straightdope.com/t/ramanujan-summation-how-does-1-2-3-4-1-12/986903/48 "2023-07-11T23:39:08Z")

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An old thread of mine on the subject.  
[​​​ ​1+2+3+4+…infinity = -1/12? - Factual Questions - Straight Dope Message Board](https://boards.straightdope.com/t/1-2-3-4-infinity-1-12/715559)

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