中文

Leavitt路代数的张量积

环与代数 2013-12-06 v3 K理论与同调 算子代数

摘要

我们计算了域kk上Leavitt路代数的Hochschild同调。作为应用,我们证明了L2L_2L2L2L_2\otimes L_2具有不同的Hochschild同调,因此它们不是Morita等价的;特别地,它们不同构。类似地,LL_\inftyLLL_\infty\otimes L_\infty也可通过其Hochschild同调区分,因此它们也不是Morita等价的。相比之下,我们证明了KK-理论无法区分这些代数;我们有K(L2)=K(L2L2)=0K_*(L_2)=K_*(L_2\otimes L_2)=0K(L)=K(LL)=K(k)K_*(L_\infty)=K_*(L_\infty\otimes L_\infty)=K_*(k)

关键词

引用

@article{arxiv.1108.0352,
  title  = {Tensor products of Leavitt path algebras},
  author = {Pere Ara and Guillermo Cortiñas},
  journal= {arXiv preprint arXiv:1108.0352},
  year   = {2013}
}

备注

10 pages. Added hypothesis to Corolary 4.5; Example 5.2 expanded, other cosmetic changes, including an e-mail address and some dashes. Final version, to appear in PAMS