I certainly agree the xkcd Venn diagram is very nice. (But: Define awkward.) This article is also nice: <http://www.ams.org/notices/200611/fea-wagon.pdf>. —Dan Rich Schroeppel écrit: ----- Today's XKCD has the best 5-variable Venn diagram drawing that I've seen. It's possible to draw VDs with any number of variables, but the diagrams are tortured, with the regions having odd shapes that make the visualization useless. It's even possible to make the single-variable regions convex, but the intersections are mostly sliver-shaped, and the dimensions vary widely. The XKCD layout is symmetric in each variable, and has reasonable size & shape for every region. There are lots of concavities, but they aren't awkward. https://xkcd.com/2122/ -----