1) contraction critical 5 connected graph
收缩临界连通图
2) contraction-critical 6-connected graph
收缩临界k-连通图
3) contraction critical 5-connected
收缩临界5-连通图
1.
In this paper we discuss the distribution of vertices of degree 5 on the longest path and cycle and thus give a characterization of contraction critical 5-connected graph in a certain aspect.
讨论收缩临界5-连通图最长路和最长圈上5度点的分布情况,刻画收缩临界5-连通图的结构。
4) contraction-critical connected
收缩临界连通
5) critically connected graph
临界连通图
6) critically 4-connected graph
临界4连通图
1.
In this paper,the properties of the maximal critically 4-connected are iscussed and a new procedure for constructing the maximal critically 4-connected graph is determined by means of graphical pasting.
引入图的粘合的概念,讨论了极大临界4连通图的性质,给出了一个图是这类图的一个充分必要条件,由此给出该类图的一种新的构造方法。
补充资料:单连通和多(复)连通超导体(simplyandmultiplyconnectedsuperconductors)
单连通和多(复)连通超导体(simplyandmultiplyconnectedsuperconductors)
单连通超导体一般指的是不包含有非超导绝缘物质或空腔贯通的整块同质超导体,若有非超导绝缘物质或空腔贯通的超导体则称为多(复)连通超导体。从几何学上讲,在超导体外表面所包围的体积内任取一曲线回路,这回路在超导物质内可收缩到零(或点),且所取的任意回路均可收缩到零而无例外,则称单连通超导体。若有例外,即不能收缩到零,则称多连通超导体。例如空心超导圆柱体,则在围绕柱空腔周围取一回路就不能收缩为零。多连通超导体可有磁通量子化现象(见“磁通量子化”)。
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参考词条