THE ELECTRONIC JOURNAL OF COMBINATORICS (ed. March 2001), DS#5.

Department of Computer Science

University of Victoria

Victoria, B.C. V8W 3P6

CANADA

Note: This is an updated version of a survey that first appeared as a Dynamic Survey in February, 1997. There is a summary of changes.

The purpose of these pages is to collect together various facts and figures about Venn diagrams, particularly as they relate to combinatorial properties of the diagrams. It is best viewed with a browser, such as Netscape or Internet Explorer, that supports tables, subscripts, and superscripts. A color monitor will also greatly increase your viewing pleasure! Aperiodic updates are planned and comments and suggestions are most welcome. If you are looking for an in-print survey, then the survey article [Ha98] of Peter Hamburger is highly recommended.

- Who was John Venn?.
- What is a Venn diagram?.
- Formal definition of Venn diagrams
- General constructions of Venn diagrams

- Graphs associated with Venn diagrams.
- The planar dual of a Venn diagram
- How many Venn diagrams are there?
- Extending Venn diagrams
- Minimum vertex Venn diagrams

- Symmetric Venn diagrams.
- Symmetric diagrams for small
*n* - Venn diagrams and Gray codes

- Symmetric diagrams for small
- Variations and Extensions of Venn diagrams.
- Geometrical Variants
- Generalizing Venn diagrams

- Open problems.
- References.
- Acknowledgements.
- Footnotes.

The icon to the left appears on all the following pages.
Clicking on it will bring you back to this page.

The 7-fold rosette at the top of the page is a Venn diagram for
*n* = 7, called "Victoria." Find out more about it by going
to the page on symmetric Venn diagrams.

There are some Venn diagrams on the pages to follow that have not
appeared before in the literature, in particular, most of the
symmetric Venn diagrams for *n*=7.

All the Venn diagram figures to be found on the following pages, unless otherwise noted, are © Frank Ruskey.

Received: August 28, 1996.

Previous edition: February 2, 1997.

Current edition: March 15, 2001.

THE ELECTRONIC JOURNAL OF COMBINATORICS (ed. March 2001), DS #5. |