Extremal polyomino chains with respect to Zagreb indices
โ Scribed by Zahra Yarahmadi; Ali Reza Ashrafi; Sirous Moradi
- Book ID
- 113449236
- Publisher
- Elsevier Science
- Year
- 2012
- Tongue
- English
- Weight
- 215 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0893-9659
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Let Z ฯญ ( z 1 , z 2 , . . . , z n ) denote a permutation of an n -set . Define and its cyclic version where f ( x , y ) increases in max อ x , y อ and decreases in min อ x , y อ . We give conditions on f such that extremal permutations with respect to weak majorization can be found . We then use t
The vertex PI index of a graph G is the sum over all edges uv โ E(G) of the number of vertices which are not equidistant to u and v. In this paper, the extremal values of this new topological index are computed. In particular, we prove that for each n-vertex graph 2 , where x denotes the greatest i