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Nov 21, 2013 at 21:46 vote accept Sebastien Palcoux
Nov 21, 2013 at 20:59 answer added Dave Penneys timeline score: 4
Nov 21, 2013 at 19:11 comment added Sebastien Palcoux @TheoJohnson-Freyd : Perhaps it's possible to replace all the null-trace generators by non-null-trace generators, I don't know.
Nov 21, 2013 at 19:00 comment added Theo Johnson-Freyd What if some of the $b_i$ trace to $0$?
Nov 21, 2013 at 15:28 history edited Sebastien Palcoux CC BY-SA 3.0
I've added pictures.
Nov 21, 2013 at 14:28 history asked Sebastien Palcoux CC BY-SA 3.0