Hi,
I begin with git so I'm not sure about what I did... but that code should
work to use FQSym:
{{{
fqs = FQSym(QQ)
}}}
or
{{{
from sage.combinat.hopf_algebras.fqsym import FreeQuasiSymmetricFunctions
fqs = FreeQuasiSymmetricFunctions(QQ)
}}}
Then you could use bases like before...
{{{
sage: F = fqs.F()
sage: F[3,2,1] ** 2
F[3, 2, 1, 6, 5, 4] + F[3, 2, 6, 1, 5, 4] + F[3, 2, 6, 5, 1, 4] + F[3, 2,
6, 5, 4, 1] + F[3, 6, 2, 1, 5, 4] + F[3, 6, 2, 5, 1, 4] + F[3, 6, 2, 5, 4,
1] + F[3, 6, 5, 2, 1, 4] + F[3, 6, 5, 2, 4, 1] + F[3, 6, 5, 4, 2, 1] + F[6,
3, 2, 1, 5, 4] + F[6, 3, 2, 5, 1, 4] + F[6, 3, 2, 5, 4, 1] + F[6, 3, 5, 2,
1, 4] + F[6, 3, 5, 2, 4, 1] + F[6, 3, 5, 4, 2, 1] + F[6, 5, 3, 2, 1, 4] +
F[6, 5, 3, 2, 4, 1] + F[6, 5, 3, 4, 2, 1] + F[6, 5, 4, 3, 2, 1]
}}}
Cheers,
Jean-Baptiste
Le mardi 4 février 2014 02:23:21 UTC+1, bump a écrit :
>
> We were trying to find FQSym in sage-git. We tried checking out the branch
> u/elixyre/ticket/13793 but did not find the code we are looking for. We
> were
> hoping to find code for FreeQuasiSymmetricFunctions similar to this:
>
> https://bitbucket.org/nborie/cha
>
> Did we check out the wrong branch?
>
> On Thursday, December 20, 2012 9:40:10 AM UTC-8, Jean-Baptiste Priez wrote:
>>
>> I try to implement some hopf algebra:
>>
>> - FQSym
>> - WQSym
>> - PQSym
>> - PBT
>>
>> The 3 firsts are in #13793 (no dependance in combinat) and PBT in #13855
>> (depends of binary_trees).
>>
>> To build these Hopf algebra, I implemented two new combinatoric objets :
>> PackedWord for WQSym and ParkingFunctions for PQSym.
>>
>> FQSym is clean I think... with some bases.
>>
>> Please comment and help me to improve that.
>>
>> Jean-Baptiste Priez (phd student of F. Hivert and N.M. Thiéry)
>> (Humm... Sorry for my bad english)
>>
>
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