The main goal of this paper is to study the density of the two circle packing, in particular, the relevant density problems of the set of incir-cles of the Archimedean tessellation (12, 12, 3).

• 利用欧式空间中正多边形的(12，12，3)阿基米德铺砌，借助一个新函数t_s，通过对t_s的计算及一系列的证明，我们得到如下结果：