I have a question about memory management in GAP. If we do eList:=[0,0,0,0]; eL2:=[]; Add(eL2, eList); Add(eL2, eList); The state of eL2 is then [ [ 0, 0, 0, 0 ], [ 0, 0, 0, 0 ] ] Now if we do eL2[1][1]:=1 then we have eL2 being [ [ 1, 0, 0, 0 ], [ 1, 0, 0, 0 ] ] because eL2 actually contains two pointers to eList.
On the other hand, if we write eL3:=[ [ 0, 0, 0, 0 ], [ 0, 0, 0, 0 ] ]; and do eL3[1][1]:=1 then we have eL3 being [ [ 1, 0, 0, 0 ], [ 0, 0, 0, 0 ] ]. Therefore the GAP object behavior depend on the way they are constructed. If one is given a matrix, is there a way to identify which one are pointing to another object? Because right now if one does not know how the objects are built then I do not know how to do it. Mathieu _______________________________________________ Forum mailing list Forum@gap-system.org https://mail.gap-system.org/mailman/listinfo/forum
