∑

See also: Σ [U+03A3 GREEK CAPITAL LETTER SIGMA], ⵉ [U+2D49 TIFINAGH LETTER YI], ᛊ [U+16CA RUNIC LETTER SOWILO S], and Ʃ [U+01A9 LATIN CAPITAL LETTER ESH]

∑ U+2211, ∑ N-ARY SUMMATION ← ∐ [U+2210] Mathematical Operators − → [U+2212]

⎲ U+23B2, ⎲ SUMMATION TOP ← ⎱ [U+23B1] Miscellaneous Technical ⎳ → [U+23B3]

⎳ U+23B3, ⎳ SUMMATION BOTTOM ← ⎲ [U+23B2] Miscellaneous Technical ⎴ → [U+23B4]

Translingual

Etymology

From Σ.

Symbol

∑

1. (mathematics) ∑. Sum over a set of like terms:

   $\sum _{n=1}^{2}n^{2}=1+4=5$