Terms containing edge of a graph

Subject	English	Russian
math.	unoriented edge of a graph	ребро графа
math.	oriented edge of a graph	дуга графа
electr.eng.	in the graph representation of a network we replace each two-terminal element by an edge	при составлении сигнального графа заменяем произвольный двухполюсный элемент ветвью графа (см. "Computer methods for circuit analysis and design" by Jiri Vlach & Kishore Singhal 1983)
math.	we thus obtain a graph of no less than k edges	не меньше