为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Two nonisomorphic graphs G and H are said to be matching equivalent if and only if G and H have the same matching polyno......

A graph G is said to be determined by its spectrum if any graph having the same spectrum as G is isomorphic to G. An H-s......

A graph G is said to be determined by its Laplacian spectrum if any graph having the same Laplacian spectrum as G is iso......