Crossing number
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Crossing number — число скрещиваний.
The crossing number of a graph is the minimum number of crossings of edges for the graph drawn on a plane. It is not the same as its genus. The genus of a graph will not exceed its crossing number. Genus and crossing number have obvious implications for the manufacture of electrical circuits on planar sheets.
Литература
- Евстигнеев В.А., Касьянов В.Н. Словарь по графам в информатике. — Новосибирск: Сибирское Научное Издательство, 2009.