Σ
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Translingual edit
Symbol edit
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 edit
(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 edit
See also edit
Ancient Greek edit
Alternative forms edit
- Ϲ (S)
Etymology edit
From Phoenician 𐤔 (š, “šīn”).
Letter edit
Σ • (S) (uppercase, nonfinal lowercase σ, final lowercase ς)
- The letter sigma (σίγμα), the 18th letter of the ancient Greek alphabet.
Derived terms edit
See also edit
Greek edit
Letter edit
Σ • (S) (uppercase, lowercase σ)
- The upper case letter sigma (σίγμα), the 18th letter of the modern Greek alphabet.
Numeral edit
Σ • (S)
- The number 200 in Greek numerals.
,Σ
- The number 200,000 in Greek numerals.