#20898: Syndrome decoder for a linear code sometimes sets wrong decoder type
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Reporter: jsrn | Type: defect
Status: new | Priority: major
Milestone: sage-7.3 | Component: coding theory
Keywords: linear code, syndrome | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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There is a bug in how the decoder type is set for the syndrome decoder.
Consider
{{{
sage: C = codes.HammingCode(GF(5), 3)
sage: D = C.decoder("Syndrome")
sage: C.minimum_distance()
3
sage: D.maximum_error_weight()
1
sage: D.decoder_type()
{'complete', 'hard-decision', 'might-error', 'unique'}
}}}
The last line should not have had "might-error" but instead should have
had "always-succeed" and "minimum-distance".
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Ticket URL: <https://trac.sagemath.org/ticket/20898>
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