Hello,
I would like to use CombinatorialFreeModule and other combinatorial
modules like group algebra. But there is always the same error when
calling .gens() (and the traceback is not so useful for explaining me
what should I do)... how do we use these objects ?
Thanks Vincent
sage:
Hi Vincent,
I think the following works:
sage: F = CombinatorialFreeModule(ZZ,(a,b))
sage: F.basis().keys()
{'a', 'b'}
sage: r = PermutationGroupElement((1,2)(3,4))
sage: u = PermutationGroupElement((1,3)(2,4))
sage: G = PermutationGroup([r,u])
sage: G.algebra(ZZ).basis().keys()
Permutation
