Studies of Euler diagrams/foravo

dummy

This is the complement of the Boolean function that states the three arguments to be equal. This function can be represented in one dimension closed to a circle. The corresponding graph is a hexagon. In a 2 dimensions it can reasonably be be shown with two or no gapspots. The latter means, that the three borders intersect in a single point. This point could be enlarged into gapspot 0 or 7. (But that would be a random choice, which should be avoided.) (Compare logota, the equivalent with 4 sets.)
both gapspots	gapspot 0	no gapspots	gapspot 7

ternary labels

both gapspots

gapspot 0

no gapspots

gapspot 7