The last of these figures known to Plato is the icosahedron. 柏拉图知道的最后一个这种构形是正二十面体。
A general algorithm which describes different DGGSs with a uniform framework on an unfolded icosahedron is introduced. 文中论述的算法在二十面体展开图上建立坐标系描述不同剖分产生的多分辨率网格，利用施奈德多面体投影映射到球面。
