The g-Extra Connectivity of the Strong Product of Paths and Cycles

The g-Extra Connectivity of the Strong Product of Paths and Cycles
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路径和循环的强乘积的 g-Extra 连接性

DOI:
10.3390/sym14091900
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发表时间:
2022-08
期刊:
Symmetry
影响因子:
--
通讯作者:
Yingzhi Tian
Yingzhi Tian
中科院分区:
其他
文献类型:
--
作者:
Qinze Zhu;Yingzhi Tian

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设G为连通图,G为非负整数。图G的顶点集S称为G -extra cut,如果G−S是不连通的,并且G−S的每个分量至少有G +1个顶点。如果G至少有一个G -extra cut, G的G -extra连通性就是G的G -extra cut的最小基数。对于两个图G1=(V1,E1)和G2=(V2,E2),强积G1⊠G2定义如下:其顶点集为V1×V2,边集为{(x1,x2)(y1,y2)|x1=x2, y1y2∈E2;或y1=y2, x1x2∈E1;或x1x2∈E1, y1y2∈E2},其中(x1,x2),(y1,y2)∈V1×V2。本文得到了两条路径的强积、一条路径与一个环的强积、两个环的强积的g-额外连通性。
Let G be a connected graph and g be a non-negative integer. A vertex set S of graph G is called a g-extra cut if G−S is disconnected and each component of G−S has at least g+1 vertices. The g-extra connectivity of G is the minimum cardinality of a g-extra cut of G if G has at least one g-extra cut. For two graphs G1=(V1,E1) and G2=(V2,E2), the strong product G1⊠G2 is defined as follows: its vertex set is V1×V2 and its edge set is {(x1,x2)(y1,y2)|x1=x2 and y1y2∈E2; or y1=y2 and x1x2∈E1; or x1x2∈E1 and y1y2∈E2}, where (x1,x2),(y1,y2)∈V1×V2. In this paper, we obtain the g-extra connectivity of the strong product of two paths, the strong product of a path and a cycle, and the strong product of two cycles.
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