Filter (mathematics)/Definition

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Revision as of 16:22, 27 November 2008 by imported>Richard Pinch (A family of subsets of a given set which has properties generalising those of a neighbourhood system in topology.)
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https://en.citizendium.org/wiki/index.php?title=Filter_(mathematics)/Definition&printable=yes
A definition or brief description of Filter (mathematics).

A family of subsets of a given set which has properties generalising those of a neighbourhood system in topology.

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