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RankOfIndicesListList changes its argument #87

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sebasguts opened this issue Jun 8, 2015 · 0 comments
Open

RankOfIndicesListList changes its argument #87

sebasguts opened this issue Jun 8, 2015 · 0 comments

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@sebasguts
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Issue by martin-leuner
Monday Oct 21, 2013 at 13:17 GMT
Originally opened as https://github.com/homalg-project/Gauss/issues/10


RowRankOfMatrix for sparse GF(2) matrices has a call which comes down to
RankOfIndicesListList( Eval(M)!.indices );

This call changes the underlying data of the sparse matrix M:

gap> h := HomalgMatrix( mat, ring );; Display( h );
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
1 . . . . 1 1 . 1 1 . . 1 . 1 . . . . . . . 1 .
. 1 1 1 . 1 1 1 1 . 1 1 1 . . 1 . 1 1 1 . 1 . .
1 . 1 . . . 1 . . 1 . 1 . . 1 . . . . 1 . 1 1 .
1 . . . . . . 1 . . 1 . 1 . 1 1 1 1 . 1 1 1 . 1
1 1 . 1 1 1 . . 1 . . . 1 1 . . . . 1 1 . . . 1
1 . . . 1 . 1 . 1 . . . . . . . . . 1 . . 1 1 1
1 1 . 1 . 1 1 . 1 . 1 1 . . . . . 1 . 1 . . . 1
. 1 1 1 . . . . . . 1 1 1 . . . 1 . 1 1 1 1 1 .
. . . 1 . . 1 1 . . 1 1 1 1 . 1 . 1 1 1 . 1 . .
1 1 1 . . 1 . 1 . 1 . 1 1 . . . . 1 1 . . 1 1 1
gap> RankOfIndicesListList( Eval(h)!.indices );; Display( h );
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . 1 . . . . . . . .
1 . 1 . . . 1 . . 1 . 1 . . 1 . . . . 1 . 1 1 .
1 . . . . . . 1 . . 1 . 1 . 1 1 1 1 . 1 1 1 . 1
1 1 . 1 1 1 . . 1 . . . 1 1 . . . . 1 1 . . . 1
1 . . . 1 . 1 . 1 . . . . . . . . . 1 . . 1 1 1
1 1 . 1 . 1 1 . 1 . 1 1 . . . . . 1 . 1 . . . 1
. 1 1 1 . . . . . . 1 1 1 . . . 1 . 1 1 1 1 1 .
. . . 1 . . 1 1 . . 1 1 1 1 . 1 . 1 1 1 . 1 . .
1 1 1 . . 1 . 1 . 1 . 1 1 . . . . 1 1 . . 1 1 1

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