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Apr 16, 2017 at 4:21 comment added Andy Putman I don't know any other systematic way to find elements, though it is not hard to find various ad-hoc constructions of elements that are at least not obviously in the kth term of the lcs.
Apr 16, 2017 at 3:53 comment added Nati I have one additional question: you mentioned "best way to find explicit elements" is by taking iterated commutators of BP's or separating twists. That's actually the only way I'm aware of ... is there another explicit construction?
Apr 16, 2017 at 1:10 vote accept Nati
Apr 16, 2017 at 1:10 comment added Nati Wow, that's a very extensive answer :-) , thanks Andy!
Apr 14, 2017 at 22:45 history edited Andy Putman CC BY-SA 3.0
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Apr 14, 2017 at 22:37 history answered Andy Putman CC BY-SA 3.0