Definify.com
Definition 2024
Σ
Σ
| ||||||||
|
---|
Translingual
Symbol
Σ
- (mathematics) Σ. Sum over a set of like terms:
- (topology) suspension or reduced suspension
- (mathematics) A class (in the arithmetical hierarchy) of formulae whose outermost unbounded quantifiers are existential quantifiers
Usage notes
(mathematics): Though there exists a distinct symbol (∑) for the purpose of the mathematical summation, the upper case sigma here is often used for convenience.
Coordinate terms
See also
Greek
Letter
Σ • (S) (uppercase, lowercase σ)
- The upper case letter sigma (σίγμα), the 18th letter of the modern Greek alphabet.
See also
- see: Appendix:Greek alphabet
Numeral
Σ • (S)
- The number 200 in Greek numerals.
,Σ
- The number 200,000 in Greek numerals.
ς
ς
| ||||||
|
---|
Greek
Letter
- The lower case letter sigma (σίγμα τελικό) of the Greek alphabet when used as the final letter in a word. In all other positions in a word the normal sigma (σ) must be used.