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![[5,-5]^7](/images/equations/HeawoodGraph/Inline1.svg)
。上面展示了希伍德圖的幾種嵌入方式。
、克諾德爾圖 
和蜂巢環面圖 
。線圖是廣義六邊形 
。
。
），這使其成為最小三次交叉數圖 (Pegg and Exoo 2009, Clancy et al. 2019)。
Incidence Graph of 
Incidence Graph of Hadamard (7,3,1)-Design." 