Authors: Mogharrab, Mojgan¹ mmogharrab@grad.kashanu.ac.ir, Maimani, Hamid Reza² maimani@ipm.ir, Ashrafi, Ali Reza¹ ashrafi@kashanu.ac.ir

Superior Title: Journal of Advanced Mathematical Studies. Sep2009, Vol. 2 Issue 2, p53-56. 4p.

Subject Terms: *VERTEX operator algebras, *GRAPHIC methods, *GRAPH theory, *GEOMETRICAL drawing, *MATHEMATICS