Euler's circles

Related to Euler's circles: Euler diagram

Euler's circles

(ˈɔɪləz)
pl n
(Logic) logic a diagram in which the terms of categorial statements are represented by circles whose inclusion in one another represents the inclusion of the extensions of the terms in one another. Compare Venn diagram
[named after Leonhard Euler]
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References in periodicals archive ?
(a) Researchers now know that Venn diagrams were previously used by Euler, being called Euler's circles and, as Bochenski (1970) shows in a photograph from Leibniz's research notebook, Leibniz was using such diagrams in advance of Euler.
Peirce's work has nothing to do with the paper's proposals (and, indeed, neither does Venn's; he was mentioned simply because his name became associated with Euler's circles).