Skip to content

Output of SyzygiesOfRows/Columns and LeftDivide/RightDivide differs from the output in GAP #50

@zickgraf

Description

@zickgraf
gap> LoadPackage( "GaussForHomalg", false ); Q := HomalgFieldOfRationals( ); Display( SyzygiesOfRows( HomalgMatrix( [ [  -1,   0,  -1,   0 ], [   0,  -1,   0,  -1 ], [   2,   0,   2,   0 ] ], 3, 4, Q ) ) );
true
Q
[ [  2,  0,  1 ] ]
julia> using MatricesForHomalg; Q = HomalgFieldOfRationals( ); display( SyzygiesOfRows( HomalgMatrix( [ [  -1,   0,  -1,   0 ], [   0,  -1,   0,  -1 ], [   2,   0,   2,   0 ] ], 3, 4, Q ) ) );
[1//1   0//1   1//2]

Note that Julia seems to normalize the first entry of the row to 1. I'm not sure if something can be done about this, but it might get important in the context of other variants of SyzygiesOfRows, for example ReducedSyzygiesOfRows.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type
    No fields configured for issues without a type.

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions