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國立中興大學 2025 · 考試 · 第 16 題

(2 points) Assuming that $G = (V, E)$ is a directed graph, which of the following descriptions is false?

(A)
If $(a, b)$ is an edge of $G$ , then $a$ is the origin vertex.
(B)
If $(a, b)$ is an edge of $G$ , then $b$ is the terminus.
(C)
An edge with the same origin vertex and terminus is called a loop.
(D)
If there is no loop in $G$ , then $G$ is a simple graph.
(E)
A vertex that is not the start or end of any edge is called an isolated vertex.

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