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Nov 10, 2013 at 19:13 comment added egosphere But yeah computation can still be hard. It's not necessarily any easier than writing the exponentially-size LP for convex hull. Though it would seem that summing something like $$\sum_s\exp(\sum_iw_is_i+\sum_{i<j}w_{ij}s_is_j)$$ over all balanced spins $s$ should be something closed form in $w$... no?
Nov 10, 2013 at 19:00 vote accept egosphere
Nov 8, 2013 at 23:36 review First posts
Nov 9, 2013 at 0:07
Nov 8, 2013 at 23:20 history answered user42545 CC BY-SA 3.0