#19653: New decoders for Generalized Reed-Solomon codes
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Reporter: dlucas | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: coding theory | Resolution:
Keywords: | Merged in:
Authors: David Lucas | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/dlucas/grs_decoders | 8673ac587f4e8bece38fc7027c96eef9771c7eec
Dependencies: #18928, #19897 | Stopgaps:
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Comment (by jsrn):
> Ah, in the meanwhile I changed this method to something based on
encoding a random element from the message space of the default encode of
a code.
> Probably not the best way to do it, I'm aware of that.
That's like pissing your pants to keep warm: it doesn't fix the problem in
the gazillion other ways this could explode (such as using a
`StaticErrorRateChannel`).
> > I think the line `R(S.list_from_positions(xrange(0, l0+1)))` can, and
should, be written `R(S[:l0+1])`
Try harder, seriously... You need to call `list` on `S[:l0+1]` as well
because the `R(...)` call is picky about getting a list and not a vector.
I just did it, but it turns out it's slower than `list_from_positions`, so
I guess you should just keep that though it looks horrendous.
--
Ticket URL: <http://trac.sagemath.org/ticket/19653#comment:44>
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