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Jun 20, 2010 at 17:33 comment added Allen Hatcher A decade after Schubert, Waldhausen also came close to the JSJ decomposition, in his work on graph manifolds for example. It almost seems as if Seifert back in the 1930s could have discovered the JSJ decomposition.
Jun 20, 2010 at 6:45 history edited Ryan Budney CC BY-SA 2.5
cut out "at least"
Jun 20, 2010 at 6:23 history answered Ryan Budney CC BY-SA 2.5