1 | initial version |

Hello,

Finite chain rings are not (yet) supported in Sage. Someone posted a patch on it on the updtae system (see: http://trac.sagemath.org/ticket/13398).

I know it's not exactly the issue here, but for now you can try the following:

`sage: F = GF(2)`

`sage: R.<x> = F[]`

`sage: g = 1+x+x^2+x^3+x^4`

`sage: C = codes.CyclicCode(5, g)`

to build your code (sorry about the bad formatting). Of course, it's over GF(2), not over a chain ring...

2 | No.2 Revision |

Hello,

Finite chain rings are not (yet) supported in Sage. Someone posted a patch on it on the updtae system (see: http://trac.sagemath.org/ticket/13398).

I know it's not exactly the issue here, but for now you can try the following:

`sage:`

~~F =~~~~GF(2)~~`GF(2) sage: R.<x> =`

~~F[]~~`F[] sage: g =`

~~1+x+x^2+x^3+x^4~~`1+x+x^2+x^3+x^4 sage: C = codes.CyclicCode(5,`

~~g)~~g)

to build your code (sorry about the bad formatting). Of course, it's over GF(2), not over a chain ring...

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