English

Hilbert series of modules over Lie algebroids

Commutative Algebra 2015-12-24 v7 Complex Variables Representation Theory

Abstract

We consider modules MM over Lie algebroids gA{\mathfrak g}_A which are of finite type over a local noetherian ring AA. Using ideals JAJ\subset A such that gAJJ{\mathfrak g}_A \cdot J\subset J and the length gA(M/JM)<\ell_{{\mathfrak g}_A}(M/JM)< \infty we can define in a natural way the Hilbert series of MM with respect to the defining ideal JJ. This notion is in particular studied for modules over the Lie algebroid of kk-linear derivations gA=TA/k(I){\mathfrak g}_A=T_{A/k}(I) that preserve an ideal IAI\subset A, for example when A=OnA={\mathcal O}_n, the ring of convergent power series. Hilbert series over Stanley-Reisner rings are also considered.

Keywords

Cite

@article{arxiv.1106.5395,
  title  = {Hilbert series of modules over Lie algebroids},
  author = {Rolf Källström and Yohannes Tadesse},
  journal= {arXiv preprint arXiv:1106.5395},
  year   = {2015}
}

Comments

42 pages. This is a substantial revision of the previous version