There seem to be zero rows in the matrices of free resolutions, that is, unit vectors are mapped to zero. Independent of whether we compute a minimal resolution or not, zero rows could be removed.
This only happens if we give to the Schreyer algorithm as required a Groebner basis. The current Oscar does not do this and only hands over a generating system (which is a bug). Then the zero rows do not appear. If we fix this bug the zero rows appear. So this issue is meant as a note to the ones currently fixing this bug.
I will try to generate an example which shows this with the current Oscar.
Note, the zero rows also a the root of a bug under discussion on graded resolutions, since they do not allow for determining the degree of the source unit vector.
There seem to be zero rows in the matrices of free resolutions, that is, unit vectors are mapped to zero. Independent of whether we compute a minimal resolution or not, zero rows could be removed.
This only happens if we give to the Schreyer algorithm as required a Groebner basis. The current Oscar does not do this and only hands over a generating system (which is a bug). Then the zero rows do not appear. If we fix this bug the zero rows appear. So this issue is meant as a note to the ones currently fixing this bug.
I will try to generate an example which shows this with the current Oscar.
Note, the zero rows also a the root of a bug under discussion on graded resolutions, since they do not allow for determining the degree of the source unit vector.