内在链图和内在纽结图是近年来比较新的一个研究领域，也是空间图中的两类重要的图。
In recent years, intrinsically linked and intrinsically knotted graphs, as very important graphs in spatial graphs, are becoming targets of some relatively new research areas.
内在纽结与3-链图，即：这个图的每个空间嵌入中都包含非平凡的纽结和分支数为3的非分离链环。
Intrinsically knotted and 3-linked graphs, that is, every spatial embedding of this graph contains nontrivial knot and a non-split 3-component link.
内在纽结与3-链图，即：这个图的每个空间嵌入中都包含非平凡的纽结和分支数为3的非分离链环。
Intrinsically knotted and 3-linked graphs, that is, every spatial embedding of this graph contains nontrivial knot and a non-split 3-component link.
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