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

TranslingualУреди

SymbolУреди

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

Шаблон:Tit2Уреди

(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 termsУреди