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May 10, 2010 at 18:51 comment added Henno Brandsma I don't see any explicit mention of that in that paragraph? And connectedness != homotopy theory ?
May 10, 2010 at 18:50 history edited Henno Brandsma CC BY-SA 2.5
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May 10, 2010 at 11:21 comment added Fabrizio Polo This was already covered in his question when he mentioned homotopy theory.
May 9, 2010 at 16:27 history answered Henno Brandsma CC BY-SA 2.5