View strings differ from GAP

[zickgraf]

Compare

gap> HomalgMatrix( [ 1, 0, 0, 0,  0, 1, 0, -1, -1, 0, 2, 1 ], 3, 4, HomalgFieldOfRationals( ) );
<A 3 x 4 matrix over an internal ring>

to

julia> HomalgMatrix( [ 1, 0, 0, 0,  0, 1, 0, -1, -1, 0, 2, 1 ], 3, 4, HomalgFieldOfRationals( ) )
[ 1//1   0//1   0//1    0//1]
[ 0//1   1//1   0//1   -1//1]
[-1//1   0//1   2//1    1//1]

[zickgraf]

This problem does not only appear for matrices but also for rings:

gap> HomalgRingOfIntegers();
Z
gap> HomalgFieldOfRationals();
Q

vs

julia> HomalgRingOfIntegers()
Integers

julia> HomalgFieldOfRationals()
Rationals

[zickgraf]

Display strings also differ:

gap> Display(HomalgZeroMatrix(0,1,HomalgFieldOfRationals()));
(an empty 0 x 1 matrix)
gap> Display(HomalgZeroMatrix(10,1,HomalgFieldOfRationals()));
[ [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ],
  [  0 ] ]

vs

julia> display(HomalgZeroMatrix(0,1,HomalgFieldOfRationals()))
0 by 1 empty matrix

julia> display(HomalgZeroMatrix(10,1,HomalgFieldOfRationals()))
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]
[0//1]

[zickgraf]

After excluding all tests in LinearAlgebraForCAP which rely on the above strings, sadly no tests remain :( Hence, in the current form, MatricesForHomalg.jl is not really usable as a drop-in replacement of the GAP package MatricesForHomalg.