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The new version of PI index and its computation for zigzag nanotubes

O. HALAKOO1, O. KHORMALI2,* , A. MAHMIANI3, A. IRANMANESH4

Affiliation

  1. Islamic Azad University Aliabad katool branch, Aliabad katool, Iran
  2. Mathematics and Informatics Research Group, ACECR, Tarbiat Modares University, P.O.Box : 14115-343, Tehran, Iran
  3. University of Payame Noor, Gonbade Kavoos, Iran
  4. Department of Mathematice, Tarbiat Modares Universiry, P. O. Box: 14115-137, Tehran, Iran

Abstract

In this paper, at first we introduce a new version of PI index and obtain some results about it. Then we compute this new index for some well-known graphs and zigzag nanotubes.

Keywords

Vertex-PI index, Edge-PI index, Molecular graph, Zigzag nanotube.

Citation

O. HALAKOO, O. KHORMALI, A. MAHMIANI, A. IRANMANESH, The new version of PI index and its computation for zigzag nanotubes, Optoelectronics and Advanced Materials - Rapid Communications, 4, 10, October 2010, pp.1559-1561 (2010).

Submitted at: Sept. 19, 2010

Accepted at: Oct. 14, 2010