数学家朱熹平和曹怀东给出了著名数学难题庞加莱猜想的完整证明。[http:--news.bbc.co.uk-chinese-simp-hi-newsid_5040000-newsid_5045100-5045120.stm BBC 中文网]url=http:--news.bbc.co.uk-chinese-simp-hi-newsid_5040000-newsid_5045100-5045120.stm [http:--news.xinhuanet.com-newscenter-2006-06-03-content_4641469.htm 新华网]url=http:--news.xinhuanet.com-newscenter-2006-06-03-content_4641469.htm