∑ (summation symbol)

English name: Shima

Chinese name: Sigma (capital σ, lowercase σ)

The eighteenth 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.

Extended data:

Twelve commonly used Greek letters

1、α,/'? What if? /,angle, coefficient, angular acceleration

2, β,/'gambling? /,angle, coefficient

3、γ,/? Gamma/angle

4、δ，δ，/'dεlt？ /,Variations, Discriminant in Quadratic Equation of One Variable

5, ε,/'ε/,the radix of logarithm

6, zeta, /zita/, coefficient, azimuth

7、η,/? Ita/, efficiency

8、θ，/'θit？ /,angle

9、κ,/? Kapa/ dielectric constant

10、λ、/'l？ md？ /,wavelength, volume, thermal conductivity

1 1、μ、/mju/

12, ξ, /ksi/, random variable, unknown specific value in (small) interval.

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