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A Venn diagram is a widely used diagram style that shows the logical relation between sets, popularized by John Venn (1834–1923) in the 1880s. The diagrams are used to teach elementary set theory, and to illustrate simple set relationships in probability, logic, statistics, linguistics and computer science.
The Venn diagram is constructed with a collection of simple closed curves drawn in the plane. The principle of these diagrams is that classes be represented by regions in such relation to one another that all the possible logical relations of these classes can be indicated in the same diagram.
In set theory the Venn diagrams tell, that there is an element in one of the red intersections. (The existential quantifications for the red intersections are combined by or. They can be combined by the exclusive or as well.) Relations like subset and implication, arranged in the same kind of matrix as above. In set theory the Venn diagrams tell,
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English: The necessary and sufficient conditions in the language of sets (Venn diagrams). Necessary condition means that in order to get into the sufficient area, S, you must at first enter the necessary area, N. Sufficient condition means that being in S ensures that you are in the N. Necessary and sufficient (if and only if) condition means that S = N.
The following 21 pages use this file: Algebra; Contraposition; Event (probability theory) Inclusion map; Set (mathematics) Subset; Talk:Assyrian people/Archive 7
Edwards-Venn diagram for 5 sets. Traced from Image:Edwards-Venn-five.png by User:HB . Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no ...
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