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topology

  1. Gord_in_Toronto

    Telescope Conjecture Disproved (Mathematics)

    If you are interested in Homotopy. An Old Conjecture Falls, Making Spheres a Lot More Complicated Honestly worth a read. Mathematical topology marches on.
  2. Brian-M

    Topology question

    Can anyone give me the official topological name for the surface you get when a two-dimensional plane with edges extending from zero to infinity is folded over so that the two edges are contiguous? And joined seamlessly so that there are no edges anymore. If a position marker at (8,0) facing...
  3. Ladewig

    Why is the densest packing of spheres called face-centered cubic packing?

    I can see hexagons, tetrahedrons, and even rhombic dodecahedrons, but I can't see any cubes. Can anyone be of help here?

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