[sage-devel] trac problem

2018-05-24 Thread 'Martin R' via sage-devel
Clicking on the branch at https://trac.sagemath.org/ticket/25434 I get: Oops… *Trac detected an internal error:* TypeError: unsupported operand type(s) for +: 'NoneType' and 'str' There was an internal error in Trac. It is recommended that you notify your local Trac administrator with the infor

[sage-devel] Matrix groups are not uniquely represented, why?

2018-05-24 Thread Simon Brandhorst
sage: G = MatrixGroup([Matrix(GF(17),2,[1,1,1,0])]) Matrix group over Finite Field of size 17 with 1 generators ( [1 1] [1 0] ) sage: H = MatrixGroup([Matrix(GF(17),2,[1,1,1,0])]) sage: G is H False The reason is probably that there is no unique representation in gap. Is this intended or to be co

[sage-devel] Re: Matrix groups are not uniquely represented, why?

2018-05-24 Thread Simon Brandhorst
Update: sage: S = SymmetricGroup(4) sage: S1 = S.subgroup(S.gens()[:1]) sage: S2 = S.subgroup(S.gens()[:1]) sage: S1 is S2 False Since the same is true for subgroups of permutation groups, I wonder if this is intended? The reason I am asking is that I implemented abelian groups and their autom