# Theta θ(g,x) and pi π(g,x) polynomials of hexagonal trapezoid system tb,a

## by ijcsa on *Nov 11, 2013*

**168**views

A counting polynomial, called Omega Ω(G,x), was proposed by Diudea. It is defined on the ground of ...

A counting polynomial, called Omega Ω(G,x), was proposed by Diudea. It is defined on the ground of

“opposite edge strips” ops. Theta Θ(G,x) and Pi Π(G,x) polynomials can also be calculated by ops

counting. In this paper we compute these counting polynomials for a family of Benzenoid graphs that called

Hexagonal trapezoid system Tb,a.

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