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The PI Index of Polyomino Chains of 4k-Cycles

✍ Scribed by Toufik Mansour; Matthias Schork

Publisher
Springer Netherlands
Year
2008
Tongue
English
Weight
340 KB
Volume
109
Category
Article
ISSN
0167-8019

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The PI Index of polyomino chains
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The PI index is a graph invariant defined as the summation of the sums of n eu (e|G) and n ev (e|G) over all the edges e = uv of a connected graph G, i.e., PI(G) = e∈E(G) [n eu (e|G) + n ev (e|G)], where n eu (e|G) is the number of edges of G lying closer to u than to v and n ev (e|G) is the number

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