I have recently created a Polyhedron Q that corresponts to the cuts of a graph.
Once I have Q, I created a list of vectors of its vertices as follows: V=[s.vector() for s in Q.vertices()] Now I create a copy of V W= copy(V) Then I change the 6th co-ordinate of each vector in W as follows for i in range(len(W)) : W[i][5]=0 That is when all the hell broke lose. The change reflected in V also (all vectors of V had now 6th coordinate 0) But that is not the shocking part: call to Q.vertices() now returns vertices where all have 6th coordinate 0! Can someone explain what is going on? Narayanan -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.