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Volume 30 Issue 6
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Zhu Shi-xin, Li Ping, Wu Bo. A Class of Repeated-root Constacyclic Codes over the Ring Fq+uFq++uk-1Fq[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1394-1396. doi: 10.3724/SP.J.1146.2006.02001
Citation: Zhu Shi-xin, Li Ping, Wu Bo. A Class of Repeated-root Constacyclic Codes over the Ring Fq+uFq++uk-1Fq[J]. Journal of Electronics & Information Technology, 2008, 30(6): 1394-1396. doi: 10.3724/SP.J.1146.2006.02001

A Class of Repeated-root Constacyclic Codes over the Ring Fq+uFq++uk-1Fq

doi: 10.3724/SP.J.1146.2006.02001
  • Received Date: 2006-12-18
  • Rev Recd Date: 2007-07-23
  • Publish Date: 2008-06-19
  • Let R=Fq+uFq++uk-1Fq,G=R[x]/ and be an invertible element in R.A new Gray mapfrom Gn to Rtn is defined.It is proved that J is a linear x-constacyclic code of length n if and only if (J) is a linear-constacyclic code over R of length tn.By means of the theory of finite rings the structure and sizes of all(u-1)-constacyclic codes over R of length pe are obtained.Especially,the structure and sizes of the duals of all (u-1)-constacyclic codes of length 2e over the ring F2m+uF2m are also obtained. Some of the results about repeated-root negacyclic codes over the ring Z2a are generalized.
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