In number theory, σ is included in various divisor functions, especially the sigma function or sum-of-divisors function. In applied mathematics, σ (T) denotes the spectrum of a linear map T.

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sigma in American English (ˈsɪɡmə ) noun Origin: Gr the eighteenth letter of the Greek alphabet (Σ, σ, ς)

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Learn about the Greek letter Sigma (σ), its pronunciation, usage examples, and common applications in mathematics, science, and engineering.

The meaning of SIGMA is the 18th letter of the Greek alphabet. How to use sigma in a sentence.

I love Sigma, it is fun to use, and can do many clever things. So means to sum things up ... Sum whatever is after the Sigma:

The Greek letter σ (sigma) is used in statistics to represent the standard of a population. It also has various uses in other areas of math and science.