|
|
|
|
Fourth order connectivity index of hexagonal chains
|
|
|
|
|
|
|
|
نویسنده
|
gong l. ,zhao m. ,chen j.
|
|
منبع
|
journal of the chemical society of pakistan - 2015 - دوره : 37 - شماره : 1 - صفحه:11 -17
|
|
چکیده
|
The higher order connectivity index is a graph invariant defined as hx(g)=∑u1u2 uh+1(du1du2 duh=1)-1/2,where the summation is taken over all possible paths of length h,and dui denotes the degree of the vertex ui of the graph g. in this paper,we stick to researching the fourth order connected index of hexagonal chains and give a calculation formula and we characterize the extremal graphs with the extremal fourth-order randić index. © 2015,chemical society of pakistan. all rights reserved.
|
|
کلیدواژه
|
Connectivity index; Extreme situation; Hexagonal chain; Randić index
|
|
آدرس
|
institute of computational mathematics,department of mathematics and computational science,hunan university of science and engineering,yongzhou, China, department of applied mathematics,guangdong university of finance,guangzhong, China, department of mathematics,hunan first normal university,hunan, China
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|