User talk:219.88.157.62

How to pronounce Σ and σ
I've scraped together enough casual greek to know that both of the symbols are 'sigma', upper and lower case. For the benefit of people who come in colder, it might be good to explicitly say so. Extra points for etymology/history about what the case difference is saying, and why this is a good greek letter for this subset of mathematics. 219.88.157.62 (talk) 06:13, 6 August 2022 (UTC)