John Venn (disambiguation)

Last updated April 12, 2019

John Venn (1834–1923) was an English logician and mathematician.

John Venn, FRS, FSA, was an English mathematician, logician and philosopher noted for introducing the Venn diagram, used in the fields of set theory, probability, logic, statistics, competition math, and computer science. In 1866, Venn published The Logic of Chance, a ground-breaking book which espoused the frequency theory of probability, offering that probability should be determined by how often something is forecast to occur as opposed to “educated” assumptions. Venn then further developed George Boole's theories in the 1881 work Symbolic Logic, where he highlighted what would become known as Venn diagrams.

John Venn may also refer to:

John Venn (academic) (died 1687), English academic administrator
John Venn (politician) (1586–1650), English politician
John Venn (priest) (1759–1813), one of the founders of the Church Missionary Society, son of Henry Venn
John Archibald Venn (1883–1958), British economist

John Venn D.D. was an English academic administrator at the University of Oxford.

John Venn was an English politician who sat in the House of Commons from 1641 to 1650. He was one of the regicides of King Charles I.

John Venn was a priest of the Church of England and a central figure of the group of religious philanthropists known as the Clapham sect.

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A Venn diagram is a diagram that shows all possible logical relations between a finite collection of different sets. These diagrams depict elements as points in the plane, and sets as regions inside closed curves. A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set. The points inside a curve labelled S represent elements of the set S, while points outside the boundary represent elements not in the set S. This lends to easily read visualizations; for example, the set of all elements that are members of both sets S and T, S ∩ T, is represented visually by the area of overlap of the regions S and T. In Venn diagrams the curves are overlapped in every possible way, showing all possible relations between the sets. They are thus a special case of Euler diagrams, which do not necessarily show all relations. Venn diagrams were conceived around 1880 by John Venn. They are used to teach elementary set theory, as well as illustrate simple set relationships in probability, logic, statistics, linguistics, and computer science.

Venn is the surname of:

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