The numbers are coloured orange., Draw a Venn diagram for ξ = {positive whole numbers less than 10}, A = {prime numbers} and B = {even numbers}. Write each set as a list of elements.

Henderson only showed that a prime number of sets is necessary, not that you can always design a symmetric Venn diagram for every prime number. Thus began a contest to find larger and larger examples.

If you think Venn diagrams are just a bunch of interlocking circles, ... Grünbaum and Edwards independently discovered this symmetrical Venn diagram for seven sets, the next prime number.

A new rose has blossomed in the garden of mathematics: a flowery Venn diagram for 11 sets of objects. Venn diagrams use overlapping circles to show all possible relationships between sets ...

Nature - Diagrams you can count on. (foreword by Ian Stewart) Johns Hopkins University Press: 2004. 128 pp. $25, 17 pound 0801874343. | ISBN: 0-801-87434-3 ...