# Set

Fundamental mathematical concept related to the notions of belonging or inclusion
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mathematical set
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properties for this type
cardinality_of_this_set
Commons category
Set theory
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Wikipedia creation date
8/9/2001
Wikipedia opening text
In mathematics, a set is a well-defined collection of distinct objects, considered as an object in its own right. For example, the numbers 2, 4, and 6 are distinct objects when considered separately, but when they are considered collectively they form a single set of size three, written {2, 4, 6}. The concept of a set is one of the most fundamental in mathematics. Developed at the end of the 19th century, set theory is now a ubiquitous part of mathematics, and can be used as a foundation from which nearly all of mathematics can be derived.
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SeT
Set (math)
Crisp set
Conventional set
Number sets
Set (mathematical)
Mathematical set
Set logic
Number set
Basic set operations
Finite subset
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