(Euler) returned 2 hits

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Author: Leonhard Euler (1707-1783)
Introduction of a notation which gives a name and address to every possible point in 3D space, $(x,y,z)$.
Category: Statistics & Graphics
Author: John Venn (1834-1923)
Representation of logical propositions and relations diagrammatically. [Actually, Liebnitz and, to some degree, Euler had used such diagrams previously.]
Category: Statistics & Graphics