加载中…
We find a graph of genus and its drawing on the orientable surface of genus with every pair of independent edges crossing an even number of times. This shows that the strong Hanani-Tutte theorem cannot be extended to the orientable surface of genus . As a base step in the construction we use a counterexample to an extension of the unified Hanani-Tutte theorem on the torus.

生成讲解博客的中文版本

生成AI智能校验的中文版本