报告题目:Several classes of cyclic codes with either optimal three weights or a few weights 
	报告人:岳勤教授(南京航空航天大学数学系) 
	报告时间:2015年12月18日(周五)下午15:30-16:30 
	报告地点:X2511 (做爱直播
学术报告厅) 
	报告摘要: 
	Abstract: 
	 In this talk, we mainly use Gauss sums to represent some exponential sums. As applications, we obtain a class of optimal three-weight codes achieving the Griesmer bound, which generalizes a Vega's result, and several classes of cyclic codes with only a few weights, which solve the open problem of Vega.