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Notice Board of the contest *** ... as of August 31, 2026 the Contest is abolished. More in the N.B. ***
4D picture of a Hopf fibration of the 3-sphere, as a set of Clifford tori filling it (the small sphere), shown together with their Dupin cyclides filling the 3D projection space (Desmos cube).
4D picture of a typical Complex Function surface and its constituents.