Combining with the condition of C-partition and tetragon 2-factor, we give new classes of upper-embeddable graphs.

联系图的顶点划分和四边形2因子的条件，本文给出了新的上可嵌入的图类。

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Maximum genus and upper embeddable are two important conceptions in graph theory.

最大亏格、上可嵌入是图论中的两个重要概念。

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In the paper, we prove a graph which satisfies the Fan's condition is upper embeddable by a sufficient and necessary condition on non-upper embeddable graphs.

文章利用关于不是上可嵌入图的充要条件，证明了范条件图是上可嵌入的。

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In the paper, we prove a graph which satisfies the Fan's condition is upper embeddable by a sufficient and necessary condition on non-upper embeddable graphs.

文章利用关于不是上可嵌入图的充要条件，证明了范条件图是上可嵌入的。

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