1 citations · 1 across the 2 of their papers we have counts for
4 papers
A characteristics for a surface sum of two handlebodies along an annulus or a once-punctured torus to be a handlebody
Fengchun Lei, He Liu, Fengling Li +1
The main results of the paper is that we give a characteristics for an annulus sum and a once-punctured torus sum of two handlebodies to be a handlebody as follows: 1. The annulus…
A theory of orbit braids
Hao Li, Zhi Lü, Fengling Li
This paper upbuilds the theoretical framework of orbit braids in by making use of the orbit configuration space , which enriches the theory of ordinary braids…
Density of roots of the Yamada polynomial of spatial graphs
Miaowang Li, Fengchun Lei, Fengling Li +1
We survey the construction and properties of the Yamada polynomial of spatial graphs and present the Yamada polynomial formulae for some classes of graphs. Then we construct an inf…
On Yamada polynomial of spatial graphs obtained by edge replacements
Miaowang Li, Fengchun Lei, Fengling Li +1
We present formulae for computing the Yamada polynomial of spatial graphs obtained by replacing edges of plane graphs, such as cycle-graphs, theta-graphs, and bouquet-graphs, by sp…