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Hans Adler (talk | contribs) m Reverted edits by 8.225.195.3 (talk) to last version by 189.59.75.37 |
DaveDaytona (talk | contribs) →Terms: added definition of XOR/exclusive OR, specifically 'i.e., "one or the other, but not both."' |
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* A '''unary operator''' applies to a single set. There is one unary operator, called logical '''NOT'''. It works by taking the [[complement (set theory)|complement]] with respect to the universe, i.e. the set of all elements under consideration.
* A '''binary operator''' applies to two sets. The basic binary operators are logical '''OR''' and logical '''AND'''. They perform the [[union (set theory)|union]] and [[intersection (set theory)|intersection]] of sets. There are also other derived binary operators, such as '''XOR''' (exclusive OR, i.e., "one or the other, but not both").
* A '''subset''' is denoted by <math>A \subseteq B</math> and means every element in set A is also in set B.
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