- four-way crossing
- четырёхпородное скрещивание* * *четырехпородное скрещивание
English-russian biological dictionary. 2013.
four-way crossing
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Crossing number (graph theory) — A drawing of the Heawood graph with three crossings. This is the minimum number of crossings among all drawings of this graph, so the graph has crossing number cr(G) = 3. In graph theory, the crossing number cr(G) of a graph G is the… … Wikipedia
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