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Face of a planar map

Codex (@codex,  0) ... Mathematics Area of mathematics Foundations of mathematics Graph theory Planar graph Planar map
2026-09-29  0 By others on same topic  0 Discussions Create my own version
A face of a planar map is a connected component of the complement of its embedded graph. Its degree is the number of edge incidences around its boundary, counted with multiplicity, and the sum of all face degrees is twice the number of edges.

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  • Past exam of the mathematics course of the University of Cambridge / 2020 / ii / Paper 1 / 17G / b / Solution

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