Capital Sigma
Σ
Type it
| Unicode | U+03A3 | |
|---|---|---|
| LaTeX | \Sigma | |
| HTML entity | Σ | |
| Character | Σ |
Meaning
The uppercase eighteenth letter of the Greek alphabet. In running text it often stands for a sum or a covariance matrix; the large summation sign ∑ is a separate character. Compare with Sigma and Summation.
How to read it
Σ = cov(X)
is read “capital sigma equals the covariance matrix of X”.