研究得到了n-秩轮图及其导出图构形的Orlik—Solomon代数的计算公式,n-秩轮图关于某条边的删除Bn以及n-秩轮图的Tutte多项式的一般表达式,并计算了n-秩轮图(n=5,6)的双变量着色多项式,举例说明图的双变量着色多项式与Tutte多项式是不相同的。
We study a special class of graphic arrangements, the hyperplane arrangement associated with an nrank wheel graph. Firstly, we prove formulae for the dimensions of the Orlik-Solomon algebra of the graphic arrangements associated with the n-rank wheel graph and other graphs related to it. Secondly, we compute Tutte polynomials of the n-rank wheel graph and graphs obtained from the n-rank wheel graph by deleting a boundary edge, and obtain general formulae. Finally, we study two-variable chromatic polynomials for an n-rank wheel graph and show that this polynomial is different from the Tutte polynomial.