Upper recollements and triangle expansions
Upper recollements and triangle expansions
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DOI:
10.1007/s10114-016-5772-0
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发表时间:
2016-10
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影响因子:
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通讯作者:
You-Qi Yin;Nan Gao
中科院分区:
文献类型:
--
作者:
You-Qi Yin;Nan Gao
By using the stablet-structure induced by an adjoint pair, we extend several results concerning recollements to upper (resp. lower) recollements. These include the fundamental results of Parshall and Scott on comparisons of recollements, Wiedemann’s result on the global dimension and Happel’s result on the finitistic dimension, occurring in a recollement (Db(A′),Db(A),Db(A″)) of bounded derived categories of Artin algebras. We introduce and describe a triangle expansion of a triangulated category and illustrate it by examples.