NormedVectors( V )
returns the set of those vectors in the row space V for that the first nonzero entry is the identity of the underlying field.
gap> v:= GF(3)^2; RowSpace( GF(3), [ [ Z(3)^0, 0*Z(3) ], [ 0*Z(3), Z(3)^0 ] ] ) gap> NormedVectors( v ); [ [ 0*Z(3), Z(3)^0 ], [ Z(3)^0, 0*Z(3) ], [ Z(3)^0, Z(3)^0 ], [ Z(3)^0, Z(3) ] ]
GAP 3.4.4