Abstract The fork is the tree obtained from the claw K 1 , 3 by subdividing one of its edges once, and the antifork is its complement graph. We give a complete description of all graphs that do not contain the fork or antifork as induced subgraphs.

中文翻译：

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排除分叉和反分叉

摘要 叉子是从爪子K 1 , 3 对其一条边进行一次细分得到的树，反叉子是它的补图。我们将所有不包含分叉或反分叉的图作为诱导子图进行完整描述。