Definition from Wiktionary, the free dictionary
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See also: Σ [U+03A3 GREEK CAPITAL LETTER SIGMA], [U+2D49 TIFINAGH LETTER YI], [U+16CA RUNIC LETTER SOWILO S], and Ʃ [U+01A9 LATIN CAPITAL LETTER ESH]
Character
Unicode name N-ARY SUMMATION
Code point U+2211
Entity number ∑
Unicode block Mathematical Operators
LaTeX input \sum
[U+2210] [U+2212]

Translingual[edit]

Etymology[edit]

From Σ.

Symbol[edit]

  1. (mathematics) . Sum over a set of like terms:
    \sum_{n=1}^2 n^2 = 1 + 4 = 5