Author/Authors :
Arjomandfar، A. نويسنده Islamic Azad University, Shahr-e Rey Branch, Tehran,, Iran , , Khormali، O. نويسنده Mathematics and Informatics Research Group,ACECR, Tarbiat Modares University, B.O. Box: 14115-343, Tehran, Iran. ,
Abstract :
In this paper, at first we mention to some results related to PI and vertex Co-PI indices and then
we introduce the edge versions of Co-PI indices. Then, we obtain some properties about these new
indices