论文标题
惠特尼类型的表面定理：表征局部平面嵌入的图形
A Whitney type theorem for surfaces: characterising graphs with locally planar embeddings
论文作者
论文摘要
我们证明，对于任何参数r，当r链式2相互连接的图形g将r colocelly嵌入在表面中，并且仅当与图形G相关的某些矩形是共绘的时。 这扩展了惠特尼的抽象平面二元定理，从1932年开始。
We prove that for any parameter r an r-locally 2-connected graph G embeds r-locally planarly in a surface if and only if a certain matroid associated to the graph G is co-graphic. This extends Whitney's abstract planar duality theorem from 1932.
