Closed Set

In geometry, topology, and related branches of mathematics, a closed set is a set whose complement is an open set. In a topological space, a closed set can be defined as a set which contains all its limit points. In a complete metric space, a closed set is a set which is closed under the limit operation.

Read more about Closed Set:  Equivalent Definitions of A Closed Set, Properties of Closed Sets, Examples of Closed Sets, More About Closed Sets

Famous quotes containing the words closed and/or set:

    “We are closed in, and the key is turned
    On our uncertainty;”
    —William Butler Yeats (1865–1939)

    “I do not set my life at a pin’s fee,
    And for my soul, what can it do to that,
    Being a thing immortal as itself?”
    —William Shakespeare (1564–1616)