A bidirectional construction links ribbon graphs on Riemann surfaces with meromorphic functions to immersed multigraphs in CP^1, showing self-intersections depend on more than surface genus alone.
6, 1219–1230
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Ribbon graphs and meromorphic functions
A bidirectional construction links ribbon graphs on Riemann surfaces with meromorphic functions to immersed multigraphs in CP^1, showing self-intersections depend on more than surface genus alone.