Σ

Translingual

Symbol

1. Template:Lb Σ. Sum over a set of like terms:

   $\sum _{n=1}^3{n}^2=1^2+2^2+3^2=14$

2. Template:Lb suspension or reduced suspension
3. Template:Lb A class (in the arithmetical hierarchy) of formulae whose outermost unbounded quantifiers are existential quantifiers

Usage notes

Template:Sense 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

• Template:Sense Template:L, Template:L

See also

• Template:Pedia

Ancient Greek

Alternative forms

• Template:Alt

Etymology

From Template:Bor.

Letter

1. The letter sigma (Template:L), the 18th letter of the ancient Greek alphabet.

Derived terms

• Template:Qualifier Template:L
• Template:Qualifier Template:L

Greek

Letter

1. The upper case letter sigma (σίγμα), the 18th letter of the modern Greek alphabet.

Numeral

1. The number 200 in Greek numerals.

,Σ

1. The number 200,000 in Greek numerals.

See also

see: Appendix:Greek alphabet