乘积<img class="" style="vertical-align: middle" height="33" width="142" border="0" alt="" src="/Jweb_sxxb_cn/UserFiles/Image/20100124-1.gif" />的平方性

Zhong Feng ZHANG, Ping Zhi YUAN

Acta Mathematica Sinica, Chinese Series . 2010, (1): 199 -204 . DOI: 10.12386/A2010sxxb0024