Greek uc sigma.svg
Σ U+03A3, Σ
GREEK CAPITAL LETTER SIGMA
[unassigned: U+03A2]
Ρ
[U+03A1]
Greek and Coptic Τ
[U+03A4]
See also: σ, ς, , , Ʃ, σ., and σ'

Contents

TranslingualEdit

SymbolEdit

Σ

  1. (mathematics) Σ. Sum over a set of like terms:
     
  2. (topology) suspension or reduced suspension
  3. (mathematics) A class (in the arithmetical hierarchy) of formulae whose outermost unbounded quantifiers are existential quantifiers

Usage notesEdit

(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 termsEdit

  • (classification of formulae): Π, Δ

See alsoEdit


GreekEdit

LetterEdit

Σ ‎(S) ‎(uppercase, lowercase σ)

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

See alsoEdit

see: Appendix:Greek alphabet

NumeralEdit

Σ ‎(S)

  1. The number 200 in Greek numerals.

  1. The number 200,000 in Greek numerals.