Sigma
Sigma (uppercase/lowercase Σ σ ς) is the 18th letter of the Greek alphabet. It is used to represent the "s" sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 200. Letters that came from it include the Roman S and Cyrillic С.
 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Greek alphabet | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||||||||||||
| History | ||||||||||||||||||||||||||||||||||||||||||||||||
|
Archaic local variants
|
||||||||||||||||||||||||||||||||||||||||||||||||
| Use in other languages | ||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||||||
| Related topics | ||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||
Mathematics
The uppercase Σ is the shorthand symbol for summation (the symbol is also known as the summation operator).[1] It is often used to condense Taylor series and to write out trigonometric functions such as sine, cosine, and tangent as series.
The lowercase σ is used to represent population standard deviation in statistics, and permutation function in abstract algebra.[1][2]
Related pages
References
- "Greek/Hebrew/Latin-based Symbols in Mathematics". Math Vault. 2020-03-20. Retrieved 2020-10-07.
- "Sigma Symbol in Greek Alphabet". www.greeksymbols.net. Retrieved 2020-10-07.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.