The football 5, 6, 6 and its geometries: from a sport tool to fullerens and further

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This presentation starts with the regular polygons, of course, then with the Platonic and Archimedean solids. The latter ones are whose symmetry groups are transitive on the vertices, and in addition, whose faces are regular polygons (see only I. Prok's home page [11] for them). Then there come these symmetry groups themselves (starting with the cube and octahedron, of course, then icosahedron and dodecahedron). Then come the space filling properties: Namely the cube is a space filler for the Euclidean space E³. Then we jump for the other regular solids that cannot fil E³, but can hyperbolic space H³, a new space. These can be understood better if we start regular polygons, of course, that cannot fil E² in general, but can fil the new plane H2, as hyperbolic or Bolyai-Lobachevsky plane. Now it raises the problem, whether a football polyhedron - with its congruent copies - fil a space. It turns out that E³ is excluded (it remains an open problem - for you, of course, in other aspects), but H³ can be filled as a schematic construction show this (Fig. 5), far from elementary. Then we mention some stories on Buckminster Fuller, an architect, who imagined first time fullerens as such crystal structures. Many problems remain open, of course, we are just in the middle of living science.