The divergence of the correlations gives as the signal of something happens in the system in low density . l is the linear dimension of neutral clusters in the ionic system . the lower density with the larger l means the forming of larger neutral clusters 而其中lebowitz長度乙表示系統中離子所形成中性團的大小,久的發散表明了在離子液體系統中,隨著密度越來越小,系統中會形成很多中性團,而且這些中性團也是越來越大的。