U+2213 • mathematics
The minus-or-plus sign (∓) used in mathematics to indicate an expression where the sign is the opposite of the corresponding plus-or-minus sign (±). It often appears in paired expressions involving ± and ∓ to represent two related values.
The Symbol For Minus-or-Plus Sign (∓) is a unicode character in the Basic Multilingual Plane Plane. It is found in the Mathematical Operators block and was approved as part of Unicode Version 1.1 in 1993
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