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Oct 19, 2012 at 4:00 comment added Ian Agol FYI, there's an error in my original paper. I stated that knot complements cannot be RFRS, but this is false e.g. for torus knots. A necessary condition is that Alexander polynomial has cyclotomic factors. Also, RAAGs are RFRS, and there are some graph 3-manifolds which are RAAGs when the defining graph is a tree (or $T^3$).
Oct 18, 2012 at 14:46 vote accept Dave Futer
Oct 18, 2012 at 14:32 answer added HJRW timeline score: 11
Oct 18, 2012 at 13:58 history asked Dave Futer CC BY-SA 3.0