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单词 null graph
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Thenullgraphis also counted as an apex graph even though it has no vertex to remove.
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An edgeless graph is occasionally referred to as anullgraphin contexts where the order-zero graph is not permitted.
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The empty graph ornullgraphmay also be the graph with no vertices and no edges.
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An edgeless graph or empty graph ornullgraphis a graph with zero or more vertices, but no edges.
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The graph with no vertices and no edges is sometimes called thenullgraphor empty graph, but the terminology is not consistent and not all mathematicians allow this object.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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更新时间：2025/5/7 5:16:51