Areas that don't overlap show the differences between sets, and a complement set refers to everything not shared by a particular set or subset. The History and Origin of Venn Diagrams John Venn ...

This is the total of the people that are not in the set of people who own a cat (the complement of cat owners). Make sure that the number of elements in the Venn diagram is equal to the number of ...

A graphic technique for visualizing set theory concepts ... union and complement. It was introduced in the late 1800s by English logician, John Venn, although it is believed that the method ...

Venn diagrams, also known as a set diagrams or logic diagrams, visually represent the relationship between two or more subjects consisting of two or more circles that overlap in the middle.

Now Khalegh Mamakani and Frank Ruskey at the University of Victoria in British Columbia, Canada, have hit on the first simple, symmetric 11-set Venn diagram (pictured). One of the sets is outlined ...

Although Venn diagrams initially applied to logic and set theory, the four-circle conundrum raised an interesting geometry question. That seed has blossomed into a fascinating investigation into ...

Venn diagrams get tricky when they include more than three sets – here, a fourth set has to be stretched across the other three. (Image: Kopophex/Wikimedia Commons) The stretching method starts ...