On the filtration of a free algebra by its associative lower central series

Details On the filtration of a free algebra by its associative lower central series On the filtration of a free algebra by its associative lower central series

2011-01-30

arxiv.org/abs/1101.5741v1

Mathematics

Rings and Algebras

Scientific paper

This paper concerns the associative lower central series ideals $M_i$ of the free algebra $A_n$ on $n$ generators. Namely, we study the successive quotients $N_i=M_i/M_{i+1}$, which admit an action of the Lie algebra $W_n$ of vector fields on $\Bbb C^n$. We bound the degree $|\lambda|$ of tensor field modules $F_\lambda$ appearing in the Jordan-H\"older series of each $N_i$, confirming a recent conjecture of Arbesfeld and Jordan. As an application, we compute these decompositions for small $n$ and $i$.

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