本文研究了环F2+uF2上的奇长度的循环码和(1+u)-循环码.运用代数方法,得到了F2+uF2上的循环码和(1+u)-循环码成为自由码的几个充要条件.推广了Bonnecaze(1999)和Aydin(2002)的关于自由码的结果.%In this paper,we study cyclic and (1+u)-cyclic codes of odd length over the ring F2+uF2.By using algebraic method we give several sufficient and necessary conditions for cyclic and (1+u)-cyclic codes over F2+uF2 to be free.It generalizes the results about free codes of Bonnecaze (1999) and Aydin (2002)
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