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most citedProper 3-orientations of bipartite planar graphs with minimum degree at least 3

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math.CO2022

Spanning bipartite quadrangulations of triangulations of the projective plane

Kenta Noguchi

We completely characterize triangulations of the projective plane that have a spanning bipartite quadrangulation subgraph. This is an affirmative answer to a question by Kündgen an…