## Set (mathematics) |

in mathematics, a

**set**is a well-defined collection of distinct objects, considered as an in its own right.object ^{[1]}^{[2]}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}.^{[3]}the concept of a set is one of the most fundamental in mathematics.^{[4]}developed at the end of the 19th century,^{[5]} is now a ubiquitous part of mathematics, and can be used as a foundation from which nearly all of mathematics can be derived.set theory ^{[4]}- etymology
- definition
- set notation
- membership
- cardinality
- special sets
- basic operations
- applications
- axiomatic set theory
- principle of inclusion and exclusion
- de morgan's laws
- see also
- notes
- references
- external links

In mathematics, a **set** is a well-defined collection of distinct objects, considered as an ^{[1]}^{[2]} 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}.^{[3]} The concept of a set is one of the most fundamental in mathematics.^{[4]} Developed at the end of the 19th century,^{[5]} ^{[4]}