∑

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

∑

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

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