Cartan decompositions and BGG-resolutions
Cartan decompositions and BGG-resolutions
复制标题
嘉当分解和 BGG 解析
DOI:
--
复制
发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Steffen König
中科院分区:
文献类型:
--
作者:
Steffen König
Necessary and sufficient criteria are given for the existence of BGG-resolutions (finite resolutions of modules by finite direct sums of Weyl modules) for simple modules over quasi-hereditary algebras, which have strong exact Borel subalgebras and strong Δ-subalgebras. Our main technical tool is the existence of Cartan decompositions for these algebras. The results apply to simple objects in the BGG-categoryO of a finite-dimensional semisimple complex Lie algebra and to finite dimensional simple rational modules over simply connected semisimple algebraic groups.