A Mathematical Foundation for Foundation Paper Pieceable Quilts:, via

They formalize things by hypergraphs, but I prefer antimatroids ( a pattern is piecable iff you can slice off one piece at a time by guillotine cuts, eventually slicing everything. The possible slicing orders form an antimatroid, because a piece, once sliceable, remains so until it is sliced. The piecing order is the reverse of a slicing order.

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