正合
Pashall and Scott have studied the structure of the recollement in a triangulated category (cf. 3), there the recollement means to decompose one triangulated category into two triangulated categories which are related by some good exact functors (cf.
Pashall和Scott在3中研究了三角范畴的recollement的结构问题,即将一个已知的三角范畴“分解”为两个三角“子”范畴,并且这两个“子”范畴与原来的已知范畴有一些好的正合函子联系,也见(5,6和12)。