Basic Set Theory Concepts

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Universal set

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A set that contains all the objects or elements under consideration, often denoted by the symbol 'U'.

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Element

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An individual object or member of a set.

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Null set

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A set with no elements, also known as the empty set, denoted by the symbol '∅' or {}.

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Intersection

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The set containing all elements that are common to two or more sets, denoted by the symbol '∩'.

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Union

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The set containing all elements from two or more sets, denoted by the symbol '∪'.

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Complement

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The set of all elements in the universal set that are not in a given set, often denoted by the symbol 'A^c' or 'A′'.