∑ English name: Sigma (capital∑, lowercase σ), which is the18th Greek letter. In Greek, if the last letter of a word is lowercase sigma, what should it be written as? This letter is also called final sigma(Unicode: U+03C2). In modern Greece, this number stands for 6.
Capitalized sigma is used for:
Mathematical summation symbol
For example:
∑Pi, where i= 1, 2, ..., t,
Is to find the sum of P 1+P2+ and ...+angle.
Lowercase σ is used for:
Statistical standard deviation
Both the с of Cyrillic alphabet and the S of Latin alphabet are derived from Sigma.
The code name of the villain in the Rockman X series is Sigma.
Also refers to summation
This writing means ∑ j =1+2+3+...+n.
develop
Panasonic has an FP∑.