chromatically equivalence 基本例句 色等价 A new method for proving the chromatically non-unique graphs is given by studying factorization their adjoint polynomials, and some structure characteristic is obtained.摘要通过研究图的伴随多项式,给出了证明非色唯一图的一种新方法,并且得到了若干图簇的色等价图的结构性质。