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A plus inside a circle, true when exactly one operand is.
Also known as: XOR, Exclusive disjunction, Either-or-but-not-both
Exclusive or is true when its operands differ. The circled plus that denotes it is one of the most overloaded characters in mathematics — it also means direct sum, and in coding theory it means addition without carrying — so its meaning is fixed by what surrounds it.
Denotes exclusive disjunction: true when exactly one of the two operands is true.
Contexts: Mathematics
Shares its character with the direct sum of vector spaces and with bitwise addition without carry, so the surrounding operands rather than the sign determine the reading.
Contexts: Mathematics
A plus sign of two equal strokes drawn inside a circle that just contains it.