Qiongxiang Huang gave the sufficient and necessary condition that a Cayley subset is a weak DCI-subset and proved that the Dihedral group D_2n is a weak 2-DCI-group.

• 另外,黄琼湘给出了Cayley子集是弱DCI-子集的充要条件,并证明了二面体群D_(2n)是弱2-DCI-群。