[GAP Forum] renaming generators of lie algebra

[Alexander Konovalov]

Dear R.N.Tsai,

It is not possible to rename generators in this case since they
do not have an attribute storing representation (IsAttributeStoringRep),
while Name is declared as an attribute:

gap> L:=SimpleLieAlgebra("A",1,Rationals);;
gap> U:=UniversalEnvelopingAlgebra(L);;
gap> g:=GeneratorsOfAlgebraWithOne(U);;
gap> IsAttributeStoringRep(g[1]);
false

To the contrary, L is in IsAttributeStoringRep, and you may assign a
name to it:

gap> IsAttributeStoringRep(L);
true
gap> SetName(L,"A");
gap> L;
A
gap> Name(L);
"A"

Best wishes,
Alexander


On 21 Jul 2009, at 02:31, R.N. Tsai wrote:

>
> Dear gap-forum,
>
> I'd like to rename the generators of lie algebras and
> their universal enveloping algebras. I tried a few things
> including this that didn't seem to work.
>
> gap> L:=SimpleLieAlgebra("A",1,Rationals);;
> gap> U:=UniversalEnvelopingAlgebra(L);;
> gap> g:=GeneratorsOfAlgebraWithOne(U);;
>
> gap> g;
> [ [(1)*x.1], [(1)*x.2], [(1)*x.3] ]
>
> gap> SetName(g[1],"MyName");
> (doesn't change the name)
>
> Thanks,
>
> R.N.
>
>
>
>
>
>
>
>
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