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See also: and 𐌎

U+229E, ⊞
SQUARED PLUS

Mathematical Operators

Translingual

Etymology

Compare , , and .

Symbol

  1. (mathematics) Generic symbol for an addition-like operation, to distinguish it from addition denoted with +.
  2. (functional analysis) Free additive convolution.
  3. (computing) Unofficial symbol for the Windows Key because of its resemblance to the Windows logo, and is nearly identical to the Windows 11 logo.