Improve Linear code from parity-check matrix

[sagetrac-dlucas]

As #19930 introduces a new encoder which computes a generator matrix for codes defined from their parity check matrices, it would be nice to update codes.LinearCodeFromCheckMatrix.

It could be renamed, made a class, and thus use the encoder described above.

Depends on #19930

Component: coding theory

Issue created by migration from https://trac.sagemath.org/ticket/19975

[sagetrac-dlucas]

Dependencies: #19930

[osj1961]

comment:2

Should the description for this ticket read "...computes a generator matrix for codes defined from their generator parity check matrices" ?

[sagetrac-dlucas]

comment:3

Replying to @osj1961:

Should the description for this ticket read "...computes a generator matrix for codes defined from their generator parity check matrices" ?

Yes, nice catch! I changed the description.

[sagetrac-dlucas]

Description changed:

--- 
+++ 
@@ -1,3 +1,3 @@
-As #19930 introduces a new encoder which computes a generator matrix for codes defined from their generator matrices, it would be nice to update `codes.LinearCodeFromCheckMatrix`.
+As #19930 introduces a new encoder which computes a generator matrix for codes defined from their parity check matrices, it would be nice to update `codes.LinearCodeFromCheckMatrix`.
 
 It could be renamed, made a class, and thus use the encoder described above.

[sagetrac-danielaugot]

comment:4

Hi David

Which encoder are you mentionning in the description of the ticket ?

Are you suggesting to use the encoder codes.encoders.LinearCodeParityCheckEncoder ?

This encoder is deprecated.

Daniel

[sagetrac-dlucas]

comment:5

Actually, the point was to use the ParityCheckEncoder to as a building brick
for some codes, instead of having LinearCodeFromCheckMatrix
But as you said, ParityCheckEncoder is deprecated, and #21165 deprecates LinearCodeFromCheckMatrix.

So, let's set this ticket to invalid/won't fix.

David

[johanrosenkilde]

comment:6

on the way to closing