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Figure 3
(Top) Labelled quotient graph of the net hcb, (bottom left) labelled quotient graph of the double net including the interaction between two opposite sheets represented as grey edges; oriented edges with voltage 10 (blue) and 01 (red). Red vertices define a maximum independent set. (Bottom right) A simpler representation with a different colour associated to independent subsets of each sheet.

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ISSN: 2053-2733
Volume 82| Part 6| November 2026| Pages 472-485
https://doi.org/10.1107/S2053273326009794