Schematic diagram of the self-assembly of cyclodextrin-azobenzene complexes in the dark (top of figure) and under the action of light (full figure). The circles next to the structures of the ...

Fig. 1. Schematic diagram of the SAGSIN architecture, consisting of spaceborne, near-space, airborne, and terrestrial networks. (IMAGE) Beijing Institute of Technology Press Co., Ltd ...

The four-ellipse image is already pretty chaotic. Maybe for five-plus sets we should abandon visual representations. But utility does not animate the mathematician so much as beauty and curiosity.