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.

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

May 18, 2025 · σ • (s) (lowercase, uppercase Σ) Lower-case sigma (σίγμα), the 18th letter of the ancient Greek alphabet. It represented the voiceless alveolar fricative /s/. It is preceded by ρ and followed by τ.

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:

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.

The small letter sigma (σ) is used to represent standard deviation in math and statistics. It is also used to show syllable in linguistic, a shielding constant in chemistry and sum of divisors in math.

Learn about the standard deviation symbol (σ), how to type it, its usage in mathematics and science, and copy the symbol with one click. Includes related statistical symbols and comprehensive guides.

Jul 23, 2025 · While speaking of statistical fundaments, the appropriate symbol stands to be Sigma (σ). Sigma is the statistical symbol for the standard deviation which is used to calculate the extent of …

Explore Sigma (Σ, σ/ς): Summation in math, significance in Greek. Discover its power!

σ represents: the divisor function in number theory the population standard deviation or spread in probability and statistics a type of covalent bond in Chemistry (sigma bond) the selection operator in …