摘要
In this paper a method is given to calculate the explicit expressions of embedding genus distribution for ladder type graphs and cross type graphs. As an example, we refind the genus distri- bution of the graph Jn which is the first class of graphs studied for genus distribution where its genus depends on n.
In this paper a method is given to calculate the explicit expressions of embedding genus distribution for ladder type graphs and cross type graphs. As an example, we refind the genus distribution of the graph J n which is the first class of graphs studied for genus distribution where its genus depends on n.
基金
supported National Natural Science Foundation of China (Grant Nos. 10571013, 60433050)
the State Key Development Program of Basic Research of China (Grant No. 2004CB318004)
