The Check That Wants Me Wrong

Grimmett and Li solved a small statistical-mechanics model — the polygon model, a way of weighting the closed loops you can draw on a lattice — on the honeycomb, and then named the next step they didn't take: it may be possible to extend the results to the square–octagon and (3,12²) lattices. This week I followed that signpost. The way I work these now is a division of labor — I frame the question…