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Dec 17, 2020 at 21:21 comment added Sam Hopkins And a somewhat related conjecture of Lam, Postnikov, and Pylyavskyy is discussed here: arxiv.org/abs/math/0608134.
Dec 17, 2020 at 21:18 comment added Sam Hopkins See also "Planar flows and quadratic relations over semirings" by Danilov, Karzanov, and Koshevoy: arxiv.org/abs/1102.2578.
Dec 17, 2020 at 2:23 history answered John Machacek CC BY-SA 4.0